Question: Check the model. Recall from Exercise 20 that the mean of the 100 car speeds in Exercise 34 was 23.84 mph, with a standard deviation

Check the model. Recall from Exercise 20 that the mean of the 100 car speeds in Exercise 34 was 23.84 mph, with a standard deviation of 3.56 mph.

a) Using a Normal model, what values should border the middle 95% of all car speeds?

b) Here are some summary statistics.

From your answer in part

a, how well does the model do in predicting those percentiles? Are you surprised? Explain.

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