Question: 9-157. Consider the water quality data in Exercise 9-157. (a) Do these data support the claim that the mean concentra- tion of suspended solids does

9-157. Consider the water quality data in Exercise 9-157. (a) Do

9-157. Consider the water quality data in Exercise 9-157. (a) Do these data support the claim that the mean concentra- tion of suspended solids does not exceed 30 parts per mil- lion? 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

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