NationalTutoringObservatory/MathEd-PII · Datasets at Hugging Face

role stringclasses 2 values	content stringlengths 0 2.1k	session_id int64 10 21.7k	sequence_id int64 0 2.38k	annotations listlengths 0 8
volunteer	that is not typed, so I'm gonna write that on the board.	7,729	142	[]
student	So, first, sorry, sorry. So first I wanted to like the the way my instructor did it is first we had to figure out the two populations being compared before we stayed the north and the research hypothesis.	7,729	143	[]
volunteer	Right	7,729	144	[]
volunteer	OK, so the first population is the people	7,729	145	[]
volunteer	who are	7,729	146	[]
volunteer	not tired	7,729	147	[]
student	So that would be the research hypothesis, ages of one.	7,729	148	[]
volunteer	Uh, we haven't	7,729	149	[]
volunteer	we haven't given the hypothesis yet. I'm just writing.	7,729	150	[]
volunteer	Yeah.	7,729	151	[]
volunteer	OK, so	7,729	152	[]
student	Oh no. Oh, I, oh, the, figuring out the populations.	7,729	153	[]
volunteer	right	7,729	154	[]
student	Oh.	7,729	155	[]
volunteer	So we have	7,729	156	[]
volunteer	so we have new	7,729	157	[]
volunteer	This is the, the known meme.	7,729	158	[]
volunteer	is 82	7,729	159	[]
volunteer	and the	7,729	160	[]
volunteer	variance	7,729	161	[]
volunteer	is	7,729	162	[]
volunteer	when	7,729	163	[]
student	Oh, so, wait, wait a minute. Hold up. So the 82 is the popular population of the means, right?	7,729	164	[]
volunteer	uh, it's the, it's the mean of the population of the people who are not tired. So that's the first group. I'm gonna write it here. So first group	7,729	165	[]
volunteer	we'll call it not tired.	7,729	166	[]
volunteer	And then the second group	7,729	167	[]
volunteer	the second group, we got	7,729	168	[]
volunteer	X bar	7,729	169	[]
volunteer	the group that is tired	7,729	170	[]
volunteer	Xar	7,729	171	[]
volunteer	equals	7,729	172	[]
volunteer	50	7,729	173	[]
student	Wait, can you slow down? I'm writing this stuff down.	7,729	174	[]
volunteer	OK	7,729	175	[]
student	Yeah, cause I just took an exam over this chapter and intro to hypothesis testing, and it was kind of difficult like the, the problem solving part because my exam is like, OK, we get 50 points on the multiple choice part and 50 points for problem solving, and there were two problem-solving questions both from this chap...	7,729	176	[]
student	exam, so it was hard for me to grasp, like, the only thing I remember from this chapter is figuring out the upper and the lower limits of the confident intervals.	7,729	177	[]
volunteer	OK	7,729	178	[]
student	which is an easy task, like, but it's free, uh, easy because I just had to know my critical values and then multiplied by my um population standard deviation of the means, plus the meat sample meat, like the began.	7,729	179	[]
volunteer	Right, OK, well, this is what we're gonna be testing. So I'm writing the data here, so it tells us that we have 50 individuals.	7,729	180	[]
student	So the X is 50.	7,729	181	[]
volunteer	No, N, N is 50.	7,729	182	[]
student	Oh, the sample sizes 50.	7,729	183	[]
volunteer	50, and it tells us that the amine	7,729	184	[]
volunteer	X bar	7,729	185	[]
student	Yeah	7,729	186	[]
volunteer	is 78.	7,729	187	[]
student	Yeah	7,729	188	[]
volunteer	Now, it tells us that	7,729	189	[]
volunteer	the significance level is 0.05. So I'm gonna write that down.	7,729	190	[]
volunteer	So	7,729	191	[]
student	So population one was um people who were not tired and population too is people who are tired.	7,729	192	[]
volunteer	that's right	7,729	193	[]
student	Thank you for coming back again. Achieve University's website thing.	7,729	194	[ { "pii_type": "SCHOOL", "surrogate": "Achieve University", "start": 33, "end": 51 } ]
volunteer	OK	7,729	195	[]
student	Yeah.	7,729	196	[]
student	Population tools people who are extremely tired, right?	7,729	197	[]
volunteer	That's right	7,729	198	[]
student	Because on the exam, I had problem figuring out which two pro which two populations were being compared.	7,729	199	[]
volunteer	Right	7,729	200	[]
student	I was stuck on there	7,729	201	[]
volunteer	Yeah, there's more than one way to do this. We cannot compare the two means directly because they, they don't tell us how many people are in the first group, people who are not tired, they only give us the mean and the variance for the, the group of tired people, group number 2, we, we're given the value of n, which is...	7,729	202	[]
volunteer	and um	7,729	203	[]
volunteer	and they tell us that their accuracy was 78.	7,729	204	[]
volunteer	So what we're gonna do, I'm gonna show you how to formulate the hypothesis.	7,729	205	[]
student	Yeah	7,729	206	[]
volunteer	All right, so	7,729	207	[]
volunteer	we're gonna write the	7,729	208	[]
volunteer	so that's the second group, so that we start with what's called the null hypothesis.	7,729	209	[]
student	No, but wait a second. My instructor, she starts with the research hypothesis.	7,729	210	[]
student	like the 8 of 1, we call it H1.	7,729	211	[]
volunteer	OK. H sub 1. All right, we'll write that one first. I'll	7,729	212	[]
volunteer	OK.	7,729	213	[]
student	Yeah, that's how I work my homework problems and stuff. So hopefully, I'm, I'm hoping that it doesn't bother you. Sorry, but.	7,729	214	[]
volunteer	No, that's fine	7,729	215	[]
volunteer	OK	7,729	216	[]
volunteer	So	7,729	217	[]
volunteer	naturally we think that people who are tired will not perform as well, so we're going to see if they perform just as well or if they're worse than the people who are not tired.	7,729	218	[]
volunteer	So what we're gonna do	7,729	219	[]
volunteer	we're gonna write the, this is the mean of the population	7,729	220	[]
volunteer	who is	7,729	221	[]
volunteer	tired. This is, we pronounce this new. You see this little symbol that I wrote.	7,729	222	[]
student	I don't	7,729	223	[]
volunteer	I led it in that, that's, that's pronounced mute. That's the symbol for the mean of the second group, the tired people, and the research hypothesis is	7,729	224	[]
student	Wait, how do I move this toolbox so I can see the information you have written, cause it's blocking the information you wrote.	7,729	225	[]
volunteer	oh, you can't see the book	7,729	226	[]
student	I, I can't see the board, but the two parks in the middle is blocking the information you wrote for number 19, problem number 19.	7,729	227	[]
volunteer	OK, can you scroll up and down?	7,729	228	[]
student	Oh, yes, I see, I see, sorry. I see.	7,729	229	[]
volunteer	OK. So we, we think that the, the research hypothesis is to see if the mean of the tired people will be less than the mean of the not tired people, so I'm going to write it like this.	7,729	230	[]
volunteer	Sou sub 2	7,729	231	[]
volunteer	less than mu sub one, that will be what you call the	7,729	232	[]
volunteer	uh research hypothesis. It's also called the alternative hypothesis.	7,729	233	[]
student	Yeah, I know that too, but we call it research hypothesis and the no hypothesis.	7,729	234	[]
volunteer	OK	7,729	235	[]
volunteer	Now we, now what we need is what's called the null hypothesis.	7,729	236	[]
student	like the opposite of the research hypothesis.	7,729	237	[]
volunteer	Exactly right	7,729	238	[]
volunteer	But we call it	7,729	239	[]
volunteer	H0	7,729	240	[]
student	Yeah	7,729	241	[]

volunteer

that is not typed, so I'm gonna write that on the board.

7,729

142

[]

student

So, first, sorry, sorry. So first I wanted to like the the way my instructor did it is first we had to figure out the two populations being compared before we stayed the north and the research hypothesis.

7,729

143

[]

volunteer

Right

7,729

144

[]

volunteer

OK, so the first population is the people

7,729

145

[]

volunteer

who are

7,729

146

[]

volunteer

not tired

7,729

147

[]

student

So that would be the research hypothesis, ages of one.

7,729

148

[]

volunteer

Uh, we haven't

7,729

149

[]

volunteer

we haven't given the hypothesis yet. I'm just writing.

7,729

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[]

volunteer

Yeah.

7,729

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[]

volunteer

OK, so

7,729

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[]

student

Oh no. Oh, I, oh, the, figuring out the populations.

7,729

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[]

volunteer

right

7,729

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[]

student

Oh.

7,729

155

[]

volunteer

So we have

7,729

156

[]

volunteer

so we have new

7,729

157

[]

volunteer

This is the, the known meme.

7,729

158

[]

volunteer

is 82

7,729

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[]

volunteer

and the

7,729

160

[]

volunteer

variance

7,729

161

[]

volunteer

is

7,729

162

[]

volunteer

when

7,729

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[]

student

Oh, so, wait, wait a minute. Hold up. So the 82 is the popular population of the means, right?

7,729

164

[]

volunteer

uh, it's the, it's the mean of the population of the people who are not tired. So that's the first group. I'm gonna write it here. So first group

7,729

165

[]

volunteer

we'll call it not tired.

7,729

166

[]

volunteer

And then the second group

7,729

167

[]

volunteer

the second group, we got

7,729

168

[]

volunteer

X bar

7,729

169

[]

volunteer

the group that is tired

7,729

170

[]

volunteer

Xar

7,729

171

[]

volunteer

equals

7,729

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[]

volunteer

50

7,729

173

[]

student

Wait, can you slow down? I'm writing this stuff down.

7,729

174

[]

volunteer

OK

7,729

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[]

student

Yeah, cause I just took an exam over this chapter and intro to hypothesis testing, and it was kind of difficult like the, the problem solving part because my exam is like, OK, we get 50 points on the multiple choice part and 50 points for problem solving, and there were two problem-solving questions both from this chap...

7,729

176

[]

student

exam, so it was hard for me to grasp, like, the only thing I remember from this chapter is figuring out the upper and the lower limits of the confident intervals.

7,729

177

[]

volunteer

OK

7,729

178

[]

student

which is an easy task, like, but it's free, uh, easy because I just had to know my critical values and then multiplied by my um population standard deviation of the means, plus the meat sample meat, like the began.

7,729

179

[]

volunteer

Right, OK, well, this is what we're gonna be testing. So I'm writing the data here, so it tells us that we have 50 individuals.

7,729

180

[]

student

So the X is 50.

7,729

181

[]

volunteer

No, N, N is 50.

7,729

182

[]

student

Oh, the sample sizes 50.

7,729

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[]

volunteer

50, and it tells us that the amine

7,729

184

[]

volunteer

X bar

7,729

185

[]

student

Yeah

7,729

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[]

volunteer

is 78.

7,729

187

[]

student

Yeah

7,729

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[]

volunteer

Now, it tells us that

7,729

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[]

volunteer

the significance level is 0.05. So I'm gonna write that down.

7,729

190

[]

volunteer

So

7,729

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[]

student

So population one was um people who were not tired and population too is people who are tired.

7,729

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[]

volunteer

that's right

7,729

193

[]

student

Thank you for coming back again. Achieve University's website thing.

7,729

194

[ { "pii_type": "SCHOOL", "surrogate": "Achieve University", "start": 33, "end": 51 } ]

volunteer

OK

7,729

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[]

student

Yeah.

7,729

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[]

student

Population tools people who are extremely tired, right?

7,729

197

[]

volunteer

That's right

7,729

198

[]

student

Because on the exam, I had problem figuring out which two pro which two populations were being compared.

7,729

199

[]

volunteer

Right

7,729

200

[]

student

I was stuck on there

7,729

201

[]

volunteer

Yeah, there's more than one way to do this. We cannot compare the two means directly because they, they don't tell us how many people are in the first group, people who are not tired, they only give us the mean and the variance for the, the group of tired people, group number 2, we, we're given the value of n, which is...

7,729

202

[]

volunteer

and um

7,729

203

[]

volunteer

and they tell us that their accuracy was 78.

7,729

204

[]

volunteer

So what we're gonna do, I'm gonna show you how to formulate the hypothesis.

7,729

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[]

student

Yeah

7,729

206

[]

volunteer

All right, so

7,729

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[]

volunteer

we're gonna write the

7,729

208

[]

volunteer

so that's the second group, so that we start with what's called the null hypothesis.

7,729

209

[]

student

No, but wait a second. My instructor, she starts with the research hypothesis.

7,729

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[]

student

like the 8 of 1, we call it H1.

7,729

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[]

volunteer

OK. H sub 1. All right, we'll write that one first. I'll

7,729

212

[]

volunteer

OK.

7,729

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[]

student

Yeah, that's how I work my homework problems and stuff. So hopefully, I'm, I'm hoping that it doesn't bother you. Sorry, but.

7,729

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[]

volunteer

No, that's fine

7,729

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[]

volunteer

OK

7,729

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[]

volunteer

So

7,729

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[]

volunteer

naturally we think that people who are tired will not perform as well, so we're going to see if they perform just as well or if they're worse than the people who are not tired.

7,729

218

[]

volunteer

So what we're gonna do

7,729

219

[]

volunteer

we're gonna write the, this is the mean of the population

7,729

220

[]

volunteer

who is

7,729

221

[]

volunteer

tired. This is, we pronounce this new. You see this little symbol that I wrote.

7,729

222

[]

student

I don't

7,729

223

[]

volunteer

I led it in that, that's, that's pronounced mute. That's the symbol for the mean of the second group, the tired people, and the research hypothesis is

7,729

224

[]

student

Wait, how do I move this toolbox so I can see the information you have written, cause it's blocking the information you wrote.

7,729

225

[]

volunteer

oh, you can't see the book

7,729

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[]

student

I, I can't see the board, but the two parks in the middle is blocking the information you wrote for number 19, problem number 19.

7,729

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[]

volunteer

OK, can you scroll up and down?

7,729

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[]

student

Oh, yes, I see, I see, sorry. I see.

7,729

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[]

volunteer

OK. So we, we think that the, the research hypothesis is to see if the mean of the tired people will be less than the mean of the not tired people, so I'm going to write it like this.

7,729

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[]

volunteer

Sou sub 2

7,729

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[]

volunteer

less than mu sub one, that will be what you call the

7,729

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[]

volunteer

uh research hypothesis. It's also called the alternative hypothesis.

7,729

233

[]

student

Yeah, I know that too, but we call it research hypothesis and the no hypothesis.

7,729

234

[]

volunteer

OK

7,729

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[]

volunteer

Now we, now what we need is what's called the null hypothesis.

7,729

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[]

student

like the opposite of the research hypothesis.

7,729

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[]

volunteer

Exactly right

7,729

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[]

volunteer

But we call it

7,729

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[]

volunteer

H0

7,729

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[]

student

Yeah

7,729

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[]