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. they were randomly assigned to three groups of ten, with each receiving one of three doses of caffeine : 0 mg, 100 mg, 200 mg. this is approximately the amount in no, one, or two cups of coffee. two hours after ingesting the caffeine, the men had the rate of finger tapping per minute recorded. the experiment was doub... | IntroductoryStatistics-OP_i6tAI7e.txt |
. mcconway, and e. ostrowski. a handbook of small datasets : data for fruitfly fecundity. london : chapman hall, 1994. chapter 13 f distribution and one way anova hand, d. j., f. daly, a. d. lunn, k. j. mcconway, and e. ostrowski. a handbook of small datasets. london : chapman hall, 1994, pg. 50. hand, d. j., f. daly, ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. chapter 13 f distribution and one way anova 55 reject the null hypothesis. there is enough evidence to say that the variance of the grades for the first student is higher than the variance in the grades for the second student. 59 ssbetween 26 sswithin 441 f 0. 2653 62 df denom 15 h0 : l t j ha : at least any two of t... | IntroductoryStatistics-OP_i6tAI7e.txt |
. similarly, ss and ns are significantly different p 0. 0006. however, the two selected groups, rs and ss are not significantly different p 0. 5176. thus we appear to have good evidence that selection either for resistance or for susceptibility involves a reduced rate of egg production for these specific strains as com... | IntroductoryStatistics-OP_i6tAI7e.txt |
. here is the anova table for the data : source of variation sum of squares ss degrees of freedom df mean square ms 3 1 2 14 3 11 14 1 13 p f 1. 5521 0. 2548 since the p value is so large, there is not good evidence against the null hypothesis of equal means. we decline to reject the null hypothesis. thus, for 2012, th... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 10. are using a credit card that gives a mile of air travel for each dollar spent and charging more than 2, 000 per month no, and they are not mutually exclusive either. no, but they are mutually exclusive. not enough information given to determine the answer 11. a sociologist wants to know the opinions of employed a... | IntroductoryStatistics-OP_i6tAI7e.txt |
the number climbs to an average of 30 per 1000 babies in an intensive care nursery. suppose that 1,000 babies from healthy baby nurseries were randomly surveyed. find the probability that exactly two babies were born deaf. 18. a friend offers you the following deal. for a 10 fee, you may pick an envelope from a box con... | IntroductoryStatistics-OP_i6tAI7e.txt |
. let e employed and f full time employment. find the percent of all mothers in the population that are not employed. find the percent of mothers in the population that are employed part time. 26. the type of employment is considered to be what type of data? 27. find the probability that a randomly selected mother work... | IntroductoryStatistics-OP_i6tAI7e.txt |
. there is the same amount of data from 4 5 as there is from 5 7. there are no data values of three. fifty percent of the data are four. using the following information to answer the next two exercises : 64 faculty members were asked the number of cars they owned including spouse and children s cars. the results are gi... | IntroductoryStatistics-OP_i6tAI7e.txt |
use the following information to answer the next three exercises: richard s furniture company delivers furniture from 10 a.m. to 2 p.m. continuously and uniformly. we are interested in how long in hours past the 10 a.m. start time that individuals wait for their delivery. 47. x 48. the average wait time is: 49. suppose... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 57. find the probability asked for in question 56. 58. find the 90th percentile for the mean amount of weight lost by 15 people. using the following information to answer the next three exercises : the time of occurrence of the first accident during rush hour traffic at a major intersection is uniformly distributed b... | IntroductoryStatistics-OP_i6tAI7e.txt |
. if a sample of 200 students is taken, how many are expected to receive 250 or cannot be determined use the following information to answer the next two exercises : p a 0. 2, p b 0. 3 ; a and b are independent events. 70. p a and b 71. p a or b 72. if h and d are mutually exclusive events, p h 0. 25, p d 0. 15, then p... | IntroductoryStatistics-OP_i6tAI7e.txt |
. define the random variable x. state the distribution for x. find the probability that lee bakes more than 25 pies in any given day. 86. six different brands of italian salad dressing were randomly selected at a supermarket. the grams of fat per serving are 7, 7, 9, 6, 8, 5. assume that the underlying distribution is ... | IntroductoryStatistics-OP_i6tAI7e.txt |
? distribution for x is still uniform with the same mean and standard deviation as the distribution for x. the distribution for x is normal with the same mean but a larger standard deviation as the distribution for x. the distribution for x is normal with a larger mean and a larger standard deviation than the distribut... | IntroductoryStatistics-OP_i6tAI7e.txt |
as the number surveyed increases, the area to the left of 1 for the student s t distribution approaches the area for the standard normal distribution. as the degrees of freedom decrease, the graph of the student s t distribution looks more like the graph of the standard if the number surveyed is 15, the normal distribu... | IntroductoryStatistics-OP_i6tAI7e.txt |
. rachel earned an 80. the mean grade on a math exam in becca s class was 47, with a standard deviation of two. becca earned a 51. the mean grade on a math exam in matt s class was 70, with a standard deviation of eight. matt earned an 83. find whose score was the best, compared to his or her own class. justify your an... | IntroductoryStatistics-OP_i6tAI7e.txt |
? use the following information to answer the next two exercises : a group of statistics students have developed a technique that they feel will lower their anxiety level on statistics exams. they measured their anxiety level at the start of the quarter and again at the end of the quarter. recorded is the paired data i... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 130. out of the years with water rationing, find the probability that there is a drought. use the following information to answer the next three exercises : 131. suppose that one individual is randomly chosen. find the probability that the person s favorite pie is apple or the person is male. 132. suppose that one ma... | IntroductoryStatistics-OP_i6tAI7e.txt |
144. given the following histogram, which distribution is the data most likely to come from? 1. c. parameter 2. a. population 3. b. statistic 4. d. sample 5. e. variable 6. quantitative continuous 1, 4, 4 8. answers will vary. 9. c. 0.80 0.30 10. b. no, and they are not mutually exclusive either. 11. a. all employed ad... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 0. 60 61. c. n 60, 5. 477 63. a. eight days 64. c. 0. 7500 65. a. 80 66. b. 35 67. b. no 68. b. quantitative continuous 69. c. 150 70. d. 0. 06 71. c. 0. 44 72. b. 0 73. d. matt is shorter than the average 14 year old boy. 74. answers will vary. cumulative relative frequency 77. m 3 ; q1 1 ; q3 4 78. 1 and 4 79. d. 8... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 133. p value 0 ; reject the null hypothesis ; conclude that they are dependent events 135. b 14, 0. 60 136. d. binomial 138. p value 0. 0006 ; reject the null hypothesis ; conclude that the averages are not equal 139. p value 0 ; reject the null hypothesis ; conclude that the proportion of males is higher 140. minimi... | IntroductoryStatistics-OP_i6tAI7e.txt |
fifty percent answer yes to this question; that fifty percent is a: 8. imagine that the u.s. federal government had the means to survey all high school seniors in the u.s. concerning their plans for future education and employment, and found that 50 percent were planning to attend a 4 year college or university in the ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. students who wished to attend this high school were required to sign contracts pledging to put forth their best effort on their school work and to obey the school rules ; if they did not wish to do so, they could attend another high school in the district. at the end of one year, student performance on statewide test... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 2. 1 : stem and leaf graphs stemplots, line graphs, and bar graphs use the following information to answer the next four exercises. the midterm grades on a chemistry exam, graded on a scale of 0 to 100, were : 62, 64, 65, 65, 68, 70, 72, 72, 74, 75, 75, 75, 76, 78, 78, 81, 83, 83, 84, 85, 87, 88, 92, 95, 98, 98, 100,... | IntroductoryStatistics-OP_i6tAI7e.txt |
37. you have to wait 90 minutes in the emergency room of a hospital before you can see a doctor. you learn that your wait time was in the 82nd percentile of all wait times. explain what this means, and whether you think it is good or bad. 2.4: box plots use the following information to answer the next three exercises. ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 55. in a biology class, the scores on the final exam were normally distributed, with a mean of 85, and a standard deviation of five. susan got a final exam score of 95. express her exam result as a z score, and interpret its meaning. use the following information to answer the next two exercises. you have a jar full ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. however, she is a streak shooter, and if she hits the center on one shot, her probability of hitting it on the shot immediately following is 0. 85. written in probability notation : p a p b p hitting the center on one shot 0. 70 p b a p hitting the center on a second shot, given that she hit it on the first 0. 85 63.... | IntroductoryStatistics-OP_i6tAI7e.txt |
. sample answer : one possibility is to obtain the class roster and assign each student a number from 1 to 200. then use a random number generator or table of random number to generate 30 numbers between 1 and 200, and select the students matching the random numbers. it would also be acceptable to write each student s ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 20. you want the sample of people who take part in a survey to be representative of the population from which they are drawn. people who refuse to take part in a survey often have different views than those who do participate, and so even a random sample may produce biased results if a large percentage of those selec... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 2. 1 : stem and leaf graphs stemplots, line graphs, and bar graphs 27. the value 740 is an outlier, because the exams were graded on a scale of 0 to 100, and 740 is far outside that range. it may be a data entry error, with the actual score being 74, so the professor should check that exam again to see what the actua... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 43. iqr 92 80 12 44. range 100 75 25 2. 5 : measures of the center of the data 45. half the runners who finished the marathon ran a time faster than 3 : 35 : 04, and half ran a time slower than 3 : 35 : 04. your time is faster than the median time, so you did better than more than half of the runners in this race. 46... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 3. 4 : contingency tables no honor roll study at least 15 hours week study less than 15 hours week 125 66. p honor roll study at least 15 hours word per week 482 1000 0. 482 67. p studies less than 15 hours word per week 125 193 68. let p s study at least 15 hours per week let p h makes the honor roll from the table,... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 4. 2 : mean or expected value and standard deviation use the following information to answer the next four exercises. three jobs are open in a company : one in the accounting department, one in the human resources department, and one in the sales department. the accounting job receives 30 applicants, and the human re... | IntroductoryStatistics-OP_i6tAI7e.txt |
. what is the domain of x for this experiment? 31. you are conducting a geometric experiment by drawing cards from a normal 52 card deck, without replacement, until you draw a red card. what is the domain of x for this experiment? use the following information to answer the next three exercises. in a particular univers... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 44. for a continuous probability function, p x 5 0. 35. what is p x 5, and how do you know? 45. describe how you would draw the continuous probability distribution described by the function f x 1 0 x 10. what type of a distribution is this? 46. for the continuous probability distribution described by the function f x... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 62. using the empirical rule, about what percent of heights in this distribution do you expect to be between 95. 5 cm and 6. 2 : using the normal distribution use the following information to answer the next four exercises. the distributor of lotto tickets claims that 20 percent of the tickets are winners. you draw a... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 74. one of your friends tries to convince you that the standard error of the mean should be 4. 5. explain what error your 75. what is the z score for a sample mean of 76? 76. what is the z score for a sample mean of 74. 7? 77. what sample mean corresponds to a z score of 1. 5? 78. if you decrease the sample size to 5... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 90. if x the diameter of one screw, what is the distribution of x? 91. suppose you repeatedly draw samples of size 100 and calculate their mean. applying the central limit theorem, what is the distribution of these sample means? 92. suppose you repeatedly draw samples of 60 and calculate their sum. applying the centr... | IntroductoryStatistics-OP_i6tAI7e.txt |
there are only two possible outcomes, and they add up to 1. the trials are independent and conducted under identical conditions. 20. no, because there are not a fixed number of trials 21. x b 100, 0.65 22. np 100 0.65 65 23. x npq 100 0.65 0.35 4.77 24. x joe gets a hit in one at bat in one occasion of his coming to ba... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the continuous variables are the amount of money spent for the books, and the amount of money received when they were 42. because for a continuous random variable, p x c 0, where c is any single value. instead, we calculate p c x d, i. e., the probability that the value of x is between the values c and d. 43. because... | IntroductoryStatistics-OP_i6tAI7e.txt |
. np 500 0. 20 100 and nq 500 0. 80 400 64. np 500 0. 20 100 npq 500 0. 20 0. 80 8. 94 65. fifty percent, because in a normal distribution, half the values lie above the mean. 66. the results of our sample were two standard deviations below the mean, suggesting it is unlikely that 20 percent of the lotto tickets are wi... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the standard error of the mean for samples of size n 50 is : 4. 5 50 0. 64 79. you would expect this range to include values up to one standard deviation above or below the mean of the sample means. in this case : 70 9 60 71. 16 and 70 9 60 68. 84 so you would expect 68 percent of the sample means to be between 68. 8... | IntroductoryStatistics-OP_i6tAI7e.txt |
. in this example, the standard deviation of the distribution is b a 12 0. 10 12 0. 03 so x n 0. 15, 0. 003 92. x n n x, n x so x n 9. 0, 0. 23 practice test 3 8. 1 : confidence interval, single population mean, population standard deviation known, normal use the following information to answer the next seven exercises... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 15. suppose your sample size had been 30 rather than 20. what would the 95 confidence interval be then? round to two 8. 3 : confidence interval for a population proportion use this information to answer the next four exercises. you conduct a poll of 500 randomly selected city residents, asking them if they own an aut... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 30. what is the relationship between the type ii error and the power of a test? 31. a new blood test is being developed to screen patients for cancer. positive results are followed up by a more accurate and expensive test. it is assumed that the patient does not have cancer. describe the null hypothesis, the type i a... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 41. you are conducting a study with 0. 01. if you get a result with a p value of 0. 006, what will be your decision? use the following information to answer the next five exercises. according to the world health organization, the average height of a one year old child is 29. you believe children with a particular dis... | IntroductoryStatistics-OP_i6tAI7e.txt |
. you administer a pretest to a group of students at the beginning of the semester, and a posttest at the end of a year s instruction using this textbook, and compare the results. are the groups in this study independent or matched? use the following information to answer the next two exercises. you are conducting a st... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 63. what are the null and alternative hypotheses for this study 64. if 65 households in community a have cable service, and 78 households in community b, what is the pooled 65. at 0. 03, will you reject the null hypothesis? what is your conclusion? 65 households in community a have cable service, and 78 households in... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 76. what is the chi square test statistic and the p value. at the 5 significance level, what do you conclude? 77. for a chi square distribution with 92 degrees of freedom, the curve. 78. for a chi square distribution with five degrees of freedom, the curve is. 11. 3 : test of independence use the following informatio... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 4. z score 1. 96 ; ebm z 1. 96 0. 73 1. 4308 5. 41 1. 43 39. 57, 42. 43 ; using the calculator function zinterval, answer is 40. 74, 41. 26. answers differ due to 6. the z value for a 90 confidence interval is 1. 645, so ebm 1. 645 0. 73 1. 20085. the 90 confidence interval is 41 1. 20 39. 80, 42. 20. the calculator ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 15. df n 1 30 1 29. t 2 2. 045 ebm zt 2. 045 0. 112 98. 4 0. 11 98. 29, 98. 51. the calculator function tinterval answer is 98. 29, 98. 51. 8. 3 : confidence interval for a population proportion 16. p 280 500 0. 56 q 1 p 1 0. 56 0. 44 17. because you are using the normal approximation to the binomial, z 1. 96. calcul... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 9. 1 : null and alternate hypotheses 23. h0 : p 0. 58 ha : p 0. 58 24. h0 : p 0. 58 ha : p 0. 58 25. h0 : 268, 000 ha : 268, 000 26. ha : 107 27. ha : p 0. 25 9. 2 : outcomes and the type i and type ii errors 28. a type i error 29. a type ii error 30. power 1 1 p type ii error. 31. the null hypothesis is that the pat... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 9. 5 : additional information and full hypothesis test examples 47. the level of significance is five percent. 50. h0 : p 0. 8 ha : p 0. 8 51. you will use the normal test for a single population proportion because np and nq are both greater than five. 10. 1 : comparing two independent population means with unknown p... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 66. using the calculator function 2 propztest, the p value 0. 0417. do not reject the null hypothesis. at the 1 significance level, there is insufficient evidence to conclude that there is a difference between the proportions of households in the two communities that have cable service. 10. 4 : matched or paired samp... | IntroductoryStatistics-OP_i6tAI7e.txt |
. at the 5 significance level, there is sufficient evidence to conclude that the poll responses independent of the participants ethnic 85. the expected value of each cell must be at least five. 86. h0 : the variables are independent. ha : the variables are not independent. 87. h0 : the populations have the same distrib... | IntroductoryStatistics-OP_i6tAI7e.txt |
. height in inches and weight in pounds in a sample of college freshman men have a linear relationship with the following summary statistics : x 68. 4 sx 4. 0 sy 9. 6 r 0. 73 let y weight and x height, and write the regression equation in the form : y a bx 13. what is the value of the slope? 14. what is the value of th... | IntroductoryStatistics-OP_i6tAI7e.txt |
? 25. in the context of regression analysis, what is the definition of an influential point, and how does an influential point differ from an outlier? 26. the least squares regression line for a data set is y 5 0. 3x and the standard deviation of the residuals is 0. 4. does a case with the values x 2, y 6. 2 qualify as... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 33. what is sswithin in this experiment, and what does it mean? 34. what is ssbetween in this experiment, and what does it mean? 35. what are k and i for this experiment? 36. if sswithin 374. 5 and sstotal 621. 4 for this data, what is ssbetween? 37. what are msbetween, and mswithin, for this experiment? 38. what is ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the dependent variable is the total labor charges to fix a car. 6. let y the total charge, and x the number of hours required. the equation is : y 55x 75 the slope is 55 and the intercept is 75. 7. y 55 3. 5 75 267. 50 8. because the intercept is included in both equations, while you are only interested in the differ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 12. 6 : testing the significance of the correlation coefficient 19. h0 : 0 ha : 0 20. t r n 2 1 r2 0. 33 30 2 1 0. 332 1. 85 the critical value for 0. 05 for a two tailed test using the t29 distribution is 2. 045. your value is less than this, so you fail to reject the null hypothesis and conclude that the study prod... | IntroductoryStatistics-OP_i6tAI7e.txt |
. residual for 2, 6. 2 : 6. 2 5. 6 0. 6 0. 6 2 0. 4 27. the predicted value for y is : y 2. 3 0. 1 4. 1 1. 89. the value of 2. 32 is more than two standard deviations from the predicted value, so it qualifies as an outlier. residual for 4. 1, 2. 34 : 2. 32 1. 89 0. 43 0. 43 2 0. 13 13. 1 : one way anova each sample is ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 35. k the number of groups 4 n1 the number of cases in group 1 30 n the total number of cases 4 30 120 36. sstotal sswithin ssbetween so ssbetween sstotal sswithin 621. 4 374. 5 246. 9 37. the mean squares in an anova are found by dividing each sum of squares by its respective degrees of freedom df. for sstotal, df n... | IntroductoryStatistics-OP_i6tAI7e.txt |
. let event b both dice show a number more than eight 1. events a and b are : mutually exclusive and independent. neither mutually exclusive nor independent. 2. find p a b. 3. which of the following are true when we perform a hypothesis test on matched or paired samples? sample sizes are almost never small. two measure... | IntroductoryStatistics-OP_i6tAI7e.txt |
. in general, are the pass rates of math 1a and math 1b statistically the same? let a the subscript for math 1a and b the subscript for math 1b. 11. if you were to conduct an appropriate hypothesis test, the alternate hypothesis would be : ha : pa pb ha : pa pb ho : pa pb ha : pa pb 12. the type i error is to : conclud... | IntroductoryStatistics-OP_i6tAI7e.txt |
19. in a hypothesis test, the p value is the probability that an outcome of the data will happen purely by chance when the null hypothesis is true. called the preconceived alpha. compared to beta to decide whether to reject or not reject the null hypothesis. answer choices a and b are both true. use the following infor... | IntroductoryStatistics-OP_i6tAI7e.txt |
. a sample of the last ten marathon winning times is collected. let x mean winning times for ten marathons. the distribution for x is : 30. suppose that phi beta kappa honors the top one percent of college and university seniors. assume that grade point means gpa at a certain college are normally distributed with a 2. ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. a random sample of 100 san jose residents indicated 15 professional, 15 clerical, 40 skilled, 10 service, and 20 semiskilled laborers. at 0. 10 does the work force in san jose appear to be consistent with the agency report for the nation? which kind of test is it? chi2 goodness of fit chi2 test of independence indepe... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the population proportion of teenagers that own a car is the : use the following information to answer the next two exercises : 2. the box plot for the data is : 3. if six were added to each value of the data in the table, the 15th percentile of the new list of values is : use the following information to answer the ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. suppose the average amount of money a customer spends in one trip to the supermarket is 72. 13. what is the probability that one customer spends less than 72 in one trip to the supermarket? 14. how much money altogether would you expect the next five customers to spend in one trip to the supermarket in 15. if you wan... | IntroductoryStatistics-OP_i6tAI7e.txt |
. there is insufficient evidence to conclude that there is a difference in the mean scores. do not reject h0. there is sufficient evidence to conclude that there is a difference in the mean scores. reject h0. there is insufficient evidence to conclude that there is no difference in the mean scores. reject h0. there is ... | IntroductoryStatistics-OP_i6tAI7e.txt |
? not enough information to answer question 30. the linear regression equation is : 0. 0094 79. 96x 79. 96 0. 0094x 79. 96 0. 0094x 0. 0094 79. 96x 31. if a site has 1, 150 employees, approximately how many bathrooms should it have? we should not be estimating here. 32. suppose that a sample of size ten was collected, ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 26. c. there is sufficient evidence to conclude that the proportion for males is higher than the proportion for females. 27. b. no 28. b. p value is close to 1. 29. b. no 30. c. y 79. 96x 0. 0094 31. d. we should not be estimating here. 33. a. the p value is 0. 10. there is insufficient information to conclude that t... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 17. 00 23. 00 14. 00 16. 00 12. 00 26. 00 20. 00 22. 00 14. 00 15. 00 22. 00 18. 00 18. 00 21. 00 21. 00 19. 00 15. 00 21. 00 18. 00 17. 00 15. 00 25. 00 14. 00 30. 00 16. 00 10. 00 20. 00 12. 00 16. 00 17. 44 16. 00 14. 00 15. 00 20. 00 20. 00 16. 00 17. 00 16. 00 15. 00 15. 00 19. 00 48. 00 16. 00 18. 00 9. 00 18. ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. use cluster, stratified, systematic, or simple random using a random number generator sampling. do not use convenience sampling. which method did you use? why did you pick that method? conduct your survey. your data size must be at least 30. summarize your data in a chart with columns showing data value, frequency, r... | IntroductoryStatistics-OP_i6tAI7e.txt |
. gather at least 150 pieces of continuous, quantitative data. define in words the random variable for your data. x create two lists of your data : 1 unordered data, 2 in order of smallest to largest. find the sample mean and the sample standard deviation rounded to two decimal places. x s construct a histogram of your... | IntroductoryStatistics-OP_i6tAI7e.txt |
. k rounded to two determine the relative frequencies rf rounded to four decimal places. rf x k rf x k rf x k find the following theoretical probabilities rounded to four decimal places. p x k p x k p x k draw the graph of the theoretical distribution of x. compare the relative frequencies to the probabilities. are the... | IntroductoryStatistics-OP_i6tAI7e.txt |
when you hand in your final project, attach the tally sheet or the packet of questionnaires that you used to collect data. your data must be real. state the statistics that are a result of your data collection: sample size, sample mean, and sample standard deviation, or sample size and number of successes. make two cop... | IntroductoryStatistics-OP_i6tAI7e.txt |
. hand in the data as you collected it. either attach your tally sheet or an envelope containing your questionnaires. bivariate data, linear regression, and univariate data student learning objectives the students will collect a bivariate data sample through the use of appropriate sampling techniques. the student will ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. for example : if your independent variable is sequential data such as year with 30 years and one piece of data per year, your x values might be 1971, 1972, 1973, 1974,, 2000. this would not be interesting to analyze. in that case, choose to use the dependent variable to analyze for this part of the project. summarize... | IntroductoryStatistics-OP_i6tAI7e.txt |
. part ii : summary page containing several paragraphs written in complete sentences describing the experiment, including what you studied and how you collected your data. the summary page should also include answers to all the questions asked above. all graphs requested in the project all calculations requested to sup... | IntroductoryStatistics-OP_i6tAI7e.txt |
. indicate the correct decision reject or do not reject the null hypothesis and write appropriate conclusions, using reason for decision : f distribution and one way anova class time : df n df d state the distribution to use for the test. what is the test statistic? what is the p value? use the previous information to ... | IntroductoryStatistics-OP_i6tAI7e.txt |
! for m, a nonnegative integer otherwise : a 1 a a formula 11 : student s t distribution x td f 1 x2 n 1 n 1 x z z n 0, 1, y d f 2, n degrees of freedom formula 12 : chi square distribution x d f f x x n 2, x 0, n positive integer and degrees of freedom formula 13 : f distribution x fd f n, d f d d f n degrees of freed... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the central limit theorem central limit theorem the central limit theorem the random variable x bar the central limit theorem mean of x the average of x the central limit theorem mean of x bar the average of x bar the central limit theorem standard deviation of x the central limit theorem standard deviation of x bar ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. error 35 link generally means that the cables have not been inserted far enough. both calculators : insert your respective end of the link cable cable both calculators : press, then quit to exit when done. manipulating one variable statistics these directions are for entering data with the built in statistical progra... | IntroductoryStatistics-OP_i6tAI7e.txt |
. to clear equations : access the list of equations. use the arrow keys to navigate to the right of each equal sign and clear them. repeat until all equations are deleted. to draw default histogram : access the zoom menu. the histogram will show with a window automatically set. to draw custom histogram : access window ... | IntroductoryStatistics-OP_i6tAI7e.txt |
. the display will show : y a bx a 3176. 909 b 1. 617 r 2 0. 924 r 0. 961 this means the line of best fit least squares line is : y 3176. 909 1. 617x percent 3176. 909 1. 617 year the correlation coefficient r 0. 961 to see the scatter plot : access graphing mode., stat plot select 1 : plot 1 to access plotting first g... | IntroductoryStatistics-OP_i6tAI7e.txt |
., v,, l4, verify that the calculator displays : 7. 642669563. this is the critical value. compare the absolute value of each residual value in l3 to 7. 64. if the absolute value is greater than 7. 64, then the x, y corresponding point is an outlier. in this case, none of the points is an outlier. to obtain estimates o... | IntroductoryStatistics-OP_i6tAI7e.txt |
. poissonpdf, x corresponds to p x x poissoncdf, x corresponds to p x x continuous distributions general uses the value 1ee99 for left bound uses the value 1ee99 for right bound normalpdf x,, yields a probability density function value only useful to plot the normal curve, in which case x is the variable normalcdf left... | IntroductoryStatistics-OP_i6tAI7e.txt |
. 2 propztest is the hypothesis test for two proportions. 2 test is the hypothesis test for independence. 2gof test is the hypothesis test for goodness of fit ti 84 only. linregttest is the hypothesis test for linear regression ti 84 only. input the null hypothesis value in the row below inpt. for a test of a single me... | IntroductoryStatistics-OP_i6tAI7e.txt |
tables nist sematech e handbook of statistical methods, http : www. itl. nist. gov div898 handbook, january student t table http : www. itl. nist. gov div898 handbook eda section3 eda3672. htm normal table http : www. itl. nist. gov div898 handbook eda section3 eda3671. htm chi square table http : www. itl. nist. gov d... | IntroductoryStatistics-OP_i6tAI7e.txt |
df, 569 dependent events, 213 descriptive statistics, 6 discrete random variable, 45 double blind experiment, 36 empirical rule, 368 empirical rule, 444 equal standard deviations, 744 equally likely, 176 equally likely, 213 equally likely, 317 error bound, 460 error bound for a population mean, 445, 457 error bound for... | IntroductoryStatistics-OP_i6tAI7e.txt |
27 outlier, 69, 89 outlier, 123, 711 p value, 511, 514, 534 paired data set, 85 paired data set, 123 parameter, 7, 444 parameter, 45, 474 pareto chart, 14 pie chart, 14 point estimate, 444 point estimate, 474 poisson distribution, 342 poisson probability distribution, poisson probability distribution, pooled proportion... | IntroductoryStatistics-OP_i6tAI7e.txt |
50 508, 513 type ii error, 508 uniform distribution, 342, 425 uniform distribution, 409 variable random variable, variance, 123, 762 variance between samples, 745 variance within samples, 745 venn diagram, 204 venn diagram, 214 z score, 384, 456 | IntroductoryStatistics-OP_i6tAI7e.txt |
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