Test Hypotheses Regarding Two Population Standard Deviations
-At a Retail $\$ 255.15$

Test Hypotheses Regarding Two Population Standard Deviations
-At a retail store, 61 female employees were randomly selected and it was found that their monthly income had a standard deviation of $\$ 255.15$ . For 121 male employees, the standard deviation was $\$ 354.27$ . Test the hypothesis that variance of monthly incomes is higher for male employees than it is for female employees. Use $\alpha = 0.01$ . Assume the samples were randomly selected from normal populations.