Answer to Question #51153 in Statistics and Probability for Mike S.

Question

4. For the previous problem 51152, The sample of 100 screws turns out to have mean = 15.005mm. (Still testing against = 15 mm and assuming population standard deviation is known to be 0.04mm.) Does this give evidence that the lengths of the screws are longer than 15mm? Explain using the important values you use to make your decision.