7.To compute the probability that in a random sample of n elements, selected without replacement, we will obtain x successes, we would use the:

a. binomial probability distribution.

b. Poisson probability distribution.

c. hypergeometric probability distribution.

d. exponential probability distribution.

8.In a lower tail hypothesis test situation, the p-value is determined to be 0.2. If the sample size for this test is 51, the t statistic has a value of:

a. .849.

b. -.849.

c. 1.299.

d. -1.299.

9.In regression analysis, the unbiased estimate of the variance is:

a. the coefficient of correlation.

b. the coefficient of determination.

c. the mean square error.

d. the slope of the regression equation.

10.Larger values ofR2R2imply that the observations are more closely grouped about the

a. average value of the independent variables.

b. average value of the dependent variable.

c. least-squares line.

d. origin.