e data to the right show the average retirement ages for a random sample of workers in Country A and a random sample of workers in Country B. Complete parts a Country A Country B nd b. Sample mean 64.5 years 66.0 years Sample size 30 30 Population standard deviation 4.3 years 5.3 years a. Perform a hypothesis test using a = 0.01 to determine if the average retirement age in Country B is higher than it is in Country A. Let population 1 be the workers in Country A and population 2 be the workers in Country B. Identify the null and alternative hypotheses. Choose the correct answer below. OA. HO: lly - 142=0 OB. HO: My - H2 SO Hy: H1 - H2# 0 H1: 14 - H2 >0 O C. Holly - H2>0 OD. HO: Hy -H2 20 H1: H1 - H2 SO H1: 14 - 12