APFIVE Regression Slope Formula and Properties
Consider the following statements regarding a least-squares regression analysis between attendance (x) and popcorn sales (y).
I. The slope of the regression line for predicting x from y is given by $$b = r \times\frac{s_x}{s_y}$$.
II. If $$r = 0.8$$, $$s_x = 50$$, and $$s_y = 20$$, the slope for predicting x from y is $$0.8 \times \frac{50}{20} = 2$$.
III. The regression line for predicting y from x has the same slope as the regression line for predicting x from y.
Which of the following statements is or are correct?
A
I and III are true.
B
Only I is true.
C
Only II is true.
D
I and II are true.
Question Leaderboard
| Rank | |||||
|---|---|---|---|---|---|
| #1 | halllais304 | 1 | 1 | 0m 59s | 41 |
| #2 | dobaonam8386 | 1 | 1 | 1m 26s | 14 |
| #3 | jung.seowoo09 | 1 | 1 | 1m 35s | 5 |
| #4 | js6366795 | 0 | 1 | 0m 00s | 0 |
| #5 | seowooj1 | 1 | 4 | 4m 59s | -229 |
| #6 | js6366795 | 0 | 2 | 17m 07s | -1,047 |
Items per page:
10
1 – 6 of 6