Q.4. A technician is making engine parts with axle diameter of 0.750 inch. A random sample of

14 parts shows a mean diameter of 0.763 inch and a S.D. of 0.0528 inch. (12)

a. Set the null hypothesis and the alternative hypothesis.

b. Choose level of significance

c. Describe the critical region

d. Compute test statistic

2

e. Draw your conclusion.