USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 56 male consumers was $131.96, and the average expenditure in a sample survey of 35 female consumers was $67.34. Based on past surveys, the standard deviation for male consumers is assumed to be $30, and the standard deviation for female consumers is assumed to be $12. The z value is 2.576. Round your answers to 2 decimal places. a. What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females? b. At 99% confidence, what is the margin of error? c. Develop a 99% confidence interval for the difference between the two population means.

USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Oo male and fernale consumers differ in the amounts ther spend? The on post survers, the utandard deviatien fer male consumers is assumed to be $30, and the standard deviation for female consumers is assumed to be $12. The 2 value 2.576 Round your ansiners to 2 decintal places. a. What is the poire edimate of the difference between the population mean expenditure for moles and the population mean expenditure for fernales? b. A. 995 confiderice, what is the margin of erron? C. Develob a 99% confidence interval for the difference between the two population means. to