John R Warren

15:41

https://docs.google.com/document/d/1cLxZzJqHtRM1K9AMSCzUtB9s8ffyHoLHUnXowOUCEUc/edit?usp=sharing

Timothy S Opdahl

40:52

.693

Hugo Mathieu

41:04

I also got 0.693

Cody T Ruthford

41:11

same here

Ella Farley

41:15

where did the 1/7 come from

Ella Farley

41:46

thanks!

Madelyn L Wolf

41:52

Can you talk about the difference in interpreting Rxy and r^2xy

Madelyn L Wolf

42:00

Unless we will get to that later

Twisha A Boradia

46:33

Where did the predicted value of y come form

Neeraj Rajasekar

47:00

Essentially by "solving" the math on the other side of the equation (similar to algebra )

Madlyn J Ott

48:15

If an R^2 was less than .1 how would you interpret that

Ryan A Moon

48:33

There’s nearly no correlation

Neeraj Rajasekar

48:50

Generally, an R-squared which is closer to 0 is considered weaker (hence, the association and explained variance are weaker)

Twisha A Boradia

49:09

Ok but where’d the 1.8 and 1.2 come from

Ryan A Moon

49:22

thats the lesst squares regression line

Neeraj Rajasekar

49:34

using the Ryx value, we plug it into the two remaining formulas on that slide

Ida Ky

49:52

Where did 3.5 come from?

Kayla T Truong

49:58

Can he interpret these answer , like what he would like us to answer on problem sets and exams

Ryan A Moon

50:00

Mean of x

Madlyn J Ott

50:00

thats the mean

Neeraj Rajasekar

50:17

X-bar and Y-bar are means. Sx and Sy are st devs.

Neeraj Rajasekar

50:45

We'll probably practice interpretation again after working on the nuts and bolts for a sec here

mason

58:23

low

Flora Yang

01:03:08

On the worksheet, it says that we need to find the correlation, but isn't that given to us here as ryx?

Tom J Moreland

01:04:04

All of mine were slightly off

Ryan A Moon

01:08:21

why can’t we just throw this into excel??

Neeraj Rajasekar

01:08:40

That's your prerogative, I guess. Our teaching / TA will focus on the formula methods

Neeraj Rajasekar

01:09:22

Note, also, that Excel sometimes uses n-1 related adjustments for st dev, st error, and the correlation calc. For that reason, we all got .20 at one point but Rob got .21 (based off the software)

Ian M Gullickson

01:13:47

Thank you!

Hugo Mathieu

01:13:50

Thank you!

Ryan A Moon

01:13:53

Thanks

Hannah Quick

01:13:58

Thank you!