1. The sampling distribution of the ratio of two independent sample variances taken from normal populations with equal variances is:

A. an F distribution

B. a chi-square distribution

C. a t distribution

D. a normal distribution

2. A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:

A. n degrees of freedom

B. n - 1 degrees of freedom

C. n - 2 degrees of freedom

D. n - 3 degrees of freedom