QDP hw 4

Hanna Vinson Problem 4-2 sd = 0.2 average time required for repair = 18.75 error rate = 0.04 confidence interval = 90 1.65 100-90=10% 10/2 = 5% sample size = 68.0625 alpha= 0.05 0.025 Z value= 1.65 The sample size will needed to reach confidence with an error rate of 0.04 the manager is 68.

90% 4 given by

Problem 4-4 Hanna Vinson Noscrap Shirt Company Applying the COUNTIF FUNCTION Answers the question: Is the shirt good or defective? GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD DEFECT DEFECT GOOD GOOD DEFECT GOOD GOOD GOOD DEFECT GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD GOOD GOOD DEFECT GOOD GOOD GOOD DEFECT GOOD GOOD GOOD GOOD GOOD GOOD GOOD GOOD Good Defective 88 12 proportion = 12% Management should that the proportion o next time a sample is