Question

Not sure what this question is asking... @zepdrix @mathmate

Answer 1

PS. I already made the scatterplot.

Answer 2

Mmm I dunno stats ;c soz

Answer 3

I swear, THIS is the last one and then I'm done...

I assume you know how to get correlation coefficient, its squared value, and the regression line?

Answer 4

yes^

Answer 5

And S as well?

Say like "The average error in predicting the y4 from x4 is about (S-value) using the LSR"

Answer 6

no...don't know the s value. haven't learned it yet I don't think

Answer 7

S is Standard deviation of residuals

Answer 8

oh

Answer 9

Basically same equation as Standard deviation, but you divide the sum of the standard values by (n-2) instead of n-1

Answer 10

oh

Answer 11

You want me to make an equation of that? or you got it?

Answer 12

i think i actually have heard of that. just haven't used it

Answer 13

okay, so that tells you the average error in predicting y4 from x4

Answer 14

ok. and how does that connect to the question?

Answer 15

That's one statement you can make about the data set.

Answer 16

Another one is using r^2

Answer 17

Whatever r^2 is, that's the percentage of y4 that can be explained from x4 using LSR

Answer 18

Oh, ok. So basically just talk about the LSRL, r, r^2, etc. and explain what they mean

Answer 19

yeah, and cause it's statistics, you have to say like "according to our model according to our LSR, based on.." yeh

Answer 20

I got points off my last quiz for not including those :(

Answer 21

ok

Answer 22

Hey would you happen to know how to use a TI 84+?

Answer 23

And then correlation coefficient tells you whether the slope is positive or negative.

Answer 24

obviously

Answer 25

lol, well I'm trying to use RESID but for some reason it's not working correctly. I have no idea where it's getting it's info, but it's not using L1 and L2

Answer 26

and the 'constant' in y-hat = a + bx which is 'a' can be like
"According to our LSR, an X4 of 0 will have a Y4 of (a)

Answer 27

uh, what about the RESID?

Answer 28

It's not working right...

Answer 29

I never learned RESID, it's not residual right?

Answer 30

it's residual. nvm, i'll look it up online

Answer 31

But you don't have any values to plug in

Answer 32

Residual = actual value - predicted value

And we aren't given any predicted value

Answer 33

I think we can leave residuals alone for this one.

Answer 34

It's for another problem

Answer 35

ahhh k. Well I g2g, I have too much physics HW. Gonna take like 2 more hours D: