Problem 8 A clothing manufacturer purchased some newly designed sewing machines in the hopes that production would be increased. The production records (in units/week) of a random sample of workers are shown below. Worker Old Machine New Machine 59 57 57 62 3 60 61 4. 66 63 69 68 59 63 72 74 52 56 58 64 10 63 64 Let a- 0.05 be the level of significance. Use the Wilcoxon signed-rank test to determine whether the new machines have significantly increased production. What would you conclude if you use the sign test instead? Describe your steps. Can one use the t-test for matched samples for this problem? 5079

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