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NationalTutoringObservatory
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MathEd-PII

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volunteer
Yeah!
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student
So like what would i say
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student
bc idk what to say honestly
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volunteer
I would reiterate in your own words what the statistics you calculate are saying.
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volunteer
For example a mode of 8 means the most common value was 8.
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volunteer
You can also write about what the statistics say about the spread and skew of the distribution if that feels appropriate
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student
ok
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student
ill free write and then can you help revise it
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volunteer
Okay!
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student
the data kinda centers around 1100, most of the values like fall between 900 n 1300. the mean n median r close so the distribution looks pretty symmetric. the mode 1050 so theres like a bunch of data around there, n the midrange 1127 shows the spread is balanced but a lil pulled up. standard deviation is 115 so the dat...
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volunteer
That looks great!
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student
Well its kinda informal
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volunteer
How's it going? :)
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student
im saying the writing is informal
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volunteer
Okay! How's the writing going?
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student
lets skip and do #4
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student
so how would i do that
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volunteer
You can click and drag your mouse to select cells.
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student
so select the full A1:A81
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student
i mean 81 omgg
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student
A1:A81
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volunteer
If you look at the sorted column, it easy to see where the first value within the range you want start and where the last value ends. You want to select those value within one standard deviation of the mean
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volunteer
Then you can change the text color somewhere up top
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student
wait so do i just change it to purple
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student
and it'll change the ones that need to be changed to purple
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student
or do i like have to go to the "A,Z" column
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volunteer
If you change the text color to purple, it will change the text color of the selected cells.
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volunteer
Does that answer your question??
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student
yes so i selected A1:A81
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student
but im asking if i only need to just change it to purple
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student
i wish Tutor Provider would let me screenshare sometimes that button shows sometimes it doesnt i dont understand why
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volunteer
Problem 4 is asking you to change the text color or cell fill color of the values in the sorted that fall in the range of the purple cell block, which is one standard deviation from the mean
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student
ohh
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student
so i have to change the color manually
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volunteer
yes :)
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student
only for the sorted lifetimes section right?
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volunteer
Yeah!
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student
ok is it ok if i send u the numbers when done and then you verify?
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student
if theyre right?
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volunteer
Sure!
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volunteer
Just a heads up, I have to leave at 2:25
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student
kk
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student
906, 911, 913, 925, 944, 958, 969, 979, 998, 1006, 1009, 1022, 1031, 1048, 1050, 1051, 1052, 1057, 1058, 1060, 1067, 1073, 1075, 1078, 1080, 1083, 1091, 1093, 1095, 1096, 1122, 1127, 1136, 1142, 1149, 1155, 1165, 1167, 1173, 1179, 1188, 1202, 1208, 1208, 1227, 1239, 1240, 1245, 1257, 1265, 1284, 1285, 1288, 1307
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volunteer
Very close! You want to make sure all values are less than the upper bound, 1304.17. If they're greater, they fall outside one standard deviation from the mean :)
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student
where did you get 1304.17 from
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student
906, 911, 913, 925, 944, 958, 969, 979, 998, 1006, 1009, 1022, 1031, 1048, 1050, 1051, 1052, 1057, 1058, 1060, 1067, 1073, 1075, 1078, 1080, 1083, 1091, 1093, 1095, 1096, 1122, 1127, 1136, 1142, 1149, 1155, 1165, 1167, 1173, 1179, 1188, 1202, 1208, 1208, 1227, 1239, 1240, 1245, 1257, 1265, 1284, 1285, 1288
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volunteer
Mean + Std Dev in the purple blocke!
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volunteer
That looks good :)
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student
my mean 1100
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student
oh nvm
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student
i see
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student
so ill highlight, 906, 911, 913, 925, 944, 958, 969, 979, 998, 1006, 1009, 1022, 1031, 1048, 1050, 1051, 1052, 1057, 1058, 1060, 1067, 1073, 1075, 1078, 1080, 1083, 1091, 1093, 1095, 1096, 1122, 1127, 1136, 1142, 1149, 1155, 1165, 1167, 1173, 1179, 1188, 1202, 1208, 1208, 1227, 1239, 1240, 1245, 1257, 1265, 1284, 1285,...
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volunteer
looks good!!
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student
and that is 54 values?
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volunteer
I'm not sure... you can take the row number of the last row you're changing minus the row number of the first row you're changing and add 1
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student
let me look
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student
52
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student
cell 15 and cell 67are highlighted
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student
so you do 67-15=52
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volunteer
and add 1
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student
oh 3
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volunteer
you can also count to double check!
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student
it wants to know how many out of the 80
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volunteer
Yeah!
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student
yep its 53
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volunteer
Nice! I have to head off now
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student
alright, thans bye! :)
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volunteer
Great work today :D
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volunteer
Hello
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student
hi could i get help with this assignment
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volunteer
Yeah, sure, I can help you with that
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volunteer
So we'll have to break down the overall equation into two parts.
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volunteer
I'm gonna type it here and you should be able to see it in a bit.
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volunteer
Do you see it on the board
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volunteer
OK, I have posted on the board and also shared an explanation.
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volunteer
Please let me know if you have any questions.
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volunteer
Are you still there
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volunteer
hi
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volunteer
Do you have any other questions
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student
hello?
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volunteer
Yup.
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student
yes i am back
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student
how do i do this because i know nothing about algebra so i want to figure out how to do this
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volunteer
OK
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student
ok so it will be x-3^2 because x^2 -6x would be 3+3=6
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student
like how it go to x + 3
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volunteer
Yeah, kind of, but let me share the formula.
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volunteer
Do you know the formula for A + B, the whole square?
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volunteer
Put it on the board
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volunteer
So A minus B is there. I'm gonna add A + B as well.
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volunteer
So basically that's what we apply for
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volunteer
the X minus 3, the whole square. You should have your answer.
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student
(a + b)² = a² + 2ab + b²
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student
yea
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volunteer
I
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volunteer
I
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volunteer
That's correct, yeah
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volunteer
There's a trick in this question because the last digit is + 14.
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volunteer
uh, that, that is what can confuse some kids, so essentially,
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volunteer
uh you get 9 by swallowing the X minus 32.
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