At a local store, 65 female employees were randomly selected and it was found that their mean monthly income was $608 with a standard deviation of $121.5 Seventy-five male employees were also randomly selected and their mean monthly income was found to be $650 with a standard deviation of $168.7 Test the hypothesis that male employees have a higher monthly income than female employees. Use significance level of 0.01 Five steps to solved the questions, with TI-84 calculator.