In an Effort to Evaluate the Hypothesis That $\sigma_{1}=\sigma_{2}$ , the Sample Variances

Multiple Choice

In an effort to evaluate the hypothesis that $\sigma_{1}=\sigma_{2}$ , the sample variances $s_{1}^{2}=18$ and $s_{2}^{2}=54$ were obtained, based on sample sizes of $n_{1}=15$ and $n_{2}=10$ , respectively. The numerator and denominator degrees of freedom are, respectively,

A) 14 and 9 .
B) 15 and 10 .
C) 10 and 15 .
D) 9 and 15