Question

8) An automobile parts supplier owns a machine that produces a cylindrical engine part. This part is supposed to have an outside diameter of 3 inches. Parts with diameters that are too small or too large do not meet customer requirements and must be rejected. To verify that parts meet customer requirements, a special study randomly samples 40 parts produced by the machine. The sample of 40 parts yields a sample mean,和3.006 inches. Assume σ 0.016. If the results show that the mean diameter does not equal the target value of 3 inches, the company will assign a problem-solving team to intensively search for the causes of the problem. Should the problem solving team be assigned? E Focus

Answer 1

Compare the calculated value with the critical value. Here, the calculated value greater than the critical value so reject the Null hypothesis. Hence, conclude that there is no sufficient evidence to support the claim that the mean diameter produced by the machine is off target|