The General Social Survey collects data on demographics, education, and work, among many other characteristics of US residents. From the 505 sampled US residents with a college degree, the average number of hours worked each week was 41.8 hours with a standard deviation of 15.1 hours. For those 667 residents without a degree, the mean was 39.4 hours with a standard deviation of 15.1 hours. Required:
Conduct a hypothesis test at significance level 0.05.