| 1 |
The regression equation always passes throught_________. |
- A. (X, Y)
- B. (X, y̅)
- C. (X̅, Y)
- D. (X̅, y̅)
|
| 2 |
If constants are added to or subtracted from the values of the variables, the value of r |
- A. is negative
- B. is positive
- C. is zero
- D. remains unchanged
|
| 3 |
When b<sub>xy</sub> is positive, then b<sub>yx</sub> will be _______. |
- A. Negative
- B. Positive
- C. Zero
- D. One
|
| 4 |
|
- A. y-intercept
- B. x-intercept
- C. slope
- D. none of these
|
| 5 |
A data points falling along a straight line is called______. |
- A. Linear relationship
- B. Non-linear relationship
- C. Linear positive
- D. Scatter diagram
|
| 6 |
If X and Y are independent, then Cov(x,y) = 0 which implies that |
- A. b<sub>yx</sub> = 0
- B. b<sub>xy</sub> = 0
- C. ρ = 0
- D. a = 0
|
| 7 |
r is the ------------ of two regression co-efficient b<sub>yx</sub> and b<sub>xy</sub> |
- A. arithmetic mean
- B. geometric mean
- C. harmonic mean
- D. median
|
| 8 |
The variable that forms the basis of estimation is called |
- A. regression
- B. regressand
- C. regressor
- D. correlation
|
| 9 |
|
- A. S<sub>xy</sub>
- B. S<sub>yx</sub>
- C. b<sub>xy</sub>
- D. b<sub>yx</sub>
|
| 10 |
Regression line x on y is |
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