Solve the Problem

Essay

Solve the problem.
-Two types of flares are tested for their burning times (in minutes)and sample results are given below. Use a 0.05 significance level to test the claim that the two brands have equal variances. $$\begin{array} { l l l } \text { Brand X } & & \text { Brand } Y \\\hline n = 35 & & { n } = 40 \\\bar { x } = 19.4 & & \bar { x } = 15.1 \\\mathrm {~s} = 1.4 & & \mathrm {~s} = 0.8\end{array}$$