Part 3: Are the requirements for the above test satisfied? Yes, because you have more than 30 observations total. Yes, because the QQ plot of the sample data for men and the QQ plot of the sample data for women both show the sample data to be approximately normally distributed. Yes, because you observed more than 10 men and more than 10 women. No, because the standard deviation of men's expenditures is more than two times the standard deviation of women's expenditures