Question

Question 2 of 4, Step 1 of 5 3/20 Correct 3 A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type Il ovens. A sample of 33 type I ovens has a mean repair cost of $89.32. The population standard deviation for the repair of type I ovens is known to be $24.88. A sample of 31 type II ovens has a mean repair cost of $84.44. The population standard deviation for the repair of type Il ovens is known to be $24.67 Conduct a hypothesis test of the technician's claim at the 0.05 level of significance. Let it be the true mean repair cost for type I ovens and be the true mean repair cost for type Il ovens. Step 1 of 5: State the null and alternative hypotheses for the test. TO Tables Keypad Answer Submit Answer © 2020 Hawkes Learning

Answer 1

Answer! Given that Type I ovens X2 Type II ovens x = $89.32 x2 =$84.44 ni = 33 nz - 31 S2 = $24.67 si - $ 24.88 X -0.05 Stepi The null and alternative hypothesis is the Hoi l, =la Ha : ",7 M2 step 2: Test Statistic :-

(5,-2) -(m,-4e) Z G И. (69.32-%4.44-0 (24.88)? (24.67) 33 + 31 0.7876 P-value - P(Z >0.7876) 1-PC2C0.7876) I-0.7852 :10.2148 HGe, p-value > 2=0.05 hypothesis. There is not so we tail to reject null sutticient evidence to support the claim that the repair cost for type I ovens is greater than the repair cost type I oven