Question

For the data in the Excel file Education and Income, find 95% confidence intervals for the mean annual income of males and the mean annual income of females. Can you conclude that the mean income of one group is larger than the other?

Education and Income
Gender	Age	Level of Education	Gross Annual Income
Female	40-60	Graduate Degree	$75,000
Female	25-39	Bachelor's Degree	$47,000
Male	40-60	High School/GED	$40,000
Female	25-39	Some College	$30,000
Female	25-39	Some College	$60,000
Female	40-60	Bachelor's Degree	$80,000
Female	25-39	Bachelor's Degree	$10,000
Female	25-39	Bachelor's Degree	$43,000
Male	25-39	Bachelor's Degree	$130,000
Female	40-60	Bachelor's Degree	$89,000
Female	40-60	Graduate Degree	$50,000
Female	18-24	Some College	$13,462
Female	25-39	Bachelor's Degree	$85,000
Male	25-39	Bachelor's Degree	$60,000
Male	40-60	Graduate Degree	$200,000
Female	25-39	Associates Degree	$44,000
Male	25-39	High School/GED	$26,000
Male	25-39	Some College	$46,100
Male	25-39	Graduate Degree	$15,000
Female	25-39	Some College	$15,288
Male	25-39	Bachelor's Degree	$58,000
Female	18-24	Bachelor's Degree	$10,000
Female	25-39	Bachelor's Degree	$85,000
Male	18-24	Bachelor's Degree	$20,000

Answer 1