A
study is done to test the claim that Company A retains its workers
longer than Company B. Company A samples 16 workers, and their
average time with the company is 5.2 years with a standard
deviation of 1.1. Company B samples 21 workers, and their average
time with the company is 4.6 years with a standard deviation of
0.9. The populations are normally distributed. Please show all
work.