ques 1)Given the least squares regression line = -2.88-1.77x, and a coefficient of determination of 0.81, the coefficient of correlation is [NOTE-- only very simple, non-number crunching calculations are needed here]:

a.

+0.90

b.

-0.88

c.

-0.90.

d.

0.88. ques 2. Consider the following ANOVA table:

Source of Variation SS df MS F

Treatments 128 4 32 2.963

Error 270 25 10.8

Total 398 29

The number of observations in each sample in a balanced ANOVA test is:

a.

6

b.

5

c.

3

d.

7

e.

4