Logo

SOC 3811/5811: Synchronous Class - Shared screen with speaker view
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!