13. Which of the following is (are) TRUE? The independent variables should not be linear combinations of each other. The independent variables must not have significant correlations with each other....

13. Which of the following is (are)  TRUE?

1. The independent variables should not be linear combinations of each other.


2. The independent variables must not have significant correlations with each other.

A. I only B.  II only C. Both I and II D.  Neither I nor II

14. Which of the following is (are)  TRUE?

1. is the change in yield per unit change in stem girth.


2. gives the change in yield per for every additional internode holding internode length and stem girth constant.

A. I only  B.  II only  C. Both I and II   D.  Neither I nor II

15. For the test to have sufficient error df , the researcher must consider the number of observations(n).For this test, how many observations(n) should be obtained in order to have an error df = 20?

A. 23  B. 24   C. 30    D. 32

Extracted text: For nos. 13 to 16. A sugarcane agronomist wants to express yield as a function of three plant traits, coded as stem girth (x,), internode length( x,) number of internodes( x,) and as independent variables using multiple regression analysis likeļso: "=Po +B;Xy +B,Xy +B3Xy +E,,i = 12.n