56​​ 60​​ 55​​ 45​​ 39 ​​29​​ 31​​ 28 50​​ 33​​ 38​​ 32​​ 21​​ 25​​ 39​​ 29
28​​ 20​​ 24​​ 33​​ 45​​ 33​​ 29​​ 28
22​​ 31​​ 27​​ 26​​ 29​​ 40​​ 33​​ 32

N = 32
Case # 3

Q2 = mean (1/2n)th and (1/2n + 1)
16th and 17th

28 26
27 = 50% quartiles

Atechnician 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 ii ovens. a sample of 6767 type i ovens has a mean repair cost of $79.79$⁢79.79. the population standard deviation for the repair of type i ovens is known to be $19.18$⁢19.18. a sample of 5555 type ii ovens has a mean repair cost of $75.24$⁢75.24. the population standard deviation for the repair of type ii ovens is known to be $21.40$⁢21.40. conduct a hypothesis test of the technician's claim at the 0.050.05 level of significance. let μ1μ1 be the true mean repair cost for type i ovens and μ2μ2 be the true mean repair cost for type ii ovens. step 2 of 4 : compute the value of the test statistic. round your answer to two decimal places.