Consider the water quality data in Exercise 6-24. (a) Do

Consider the water quality data in Exercise 6-24.
(a) Do these data support the claim that mean concentration of suspended solids does not exceed 50 parts per million?
Use a = 0.05.
(b) What is the P-value for the test in part (a)?
(c) Does the normal distribution seem to be a reasonable model for these data? Perform an appropriate goodness of-fit test to answer this question.