An inspector are measured the diameter of a ball bearing
Chapter 9, Problem 127E(choose chapter or problem)
Problem 127E
An inspector are measured the diameter of a ball bearing using a new type of caliper. The results were as follows (in mm): 0.265, 0.263, 0.266, 0.267, 0.267, 0.265, 0.267,0.267, 0.265, 0.268, 0.268, and 0.263.
(a) Use the Wilcoxon signed-rank test to evaluate the claim that the mean ball diameter is 0.265 mm. Use α = 0.05.
(b) Use the normal approximation for the test. With α = 0.05. , what conclusions can you draw?
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