Test the given claim using the $\alpha = 0.02$ significance level and assuming that the populations are normally distributed.
Claim: The treatment population and the placebo population have different variances.
Treatment group: $n=9,$ $\overline{x}=123,$ $s=18.2.$
Placebo group: $n=7,$ $\overline{x}=141.2,$ $s=10.8.$
The test statistic is
The larger critical value is
What is your conclusion?

A. There is sufficient evidence to support the claim that the treatment and placebo populations have different variances.
B. There is not sufficient evidence to support the claim that the treatment and placebo populations have different variances.