You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model A and Model B are equal. You research the repair costs. The mean repair cost of 27 Model A washing machines is $210. Assume the population standard deviation is $20. The mean repair cost of 30 Model B washing machines is $216. Assume the population standard deviation is $25. At a=0.01, can you reject the salesperson's claim? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha- What is the claim? OA. The mean repair cost for Model A is greater than Model B. OB. The mean repair costs for Model A and Model B are different. C. The mean repair costs for Model A and Model B are equal. OD. The mean repair cost for Model A is less than Model B. Let u, be the mean repair cost for Model A and let ₂ be the mean repair cost for Model B. What are Ho and H₂? OA. Ho: H₁ H₂ Hai HH2 OD. Ho: H₁ H₂ Hai HH2 OB. Ho: H₁ H₂ Ha: H1 H₂ CO O E. Ho: H₁ H₂ Ha: H₁2H₂ (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to two decimal places as needed. Use a comma to separate answers as needed.) What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) within your choice. OC. Ho: H₁ H₂ H₂: H=1₂ OF. Ho: H₁ H₂ Hồ Hg> H2