Wisconsin ACT math II This plot shows the mean ACT scores for Wisconsin schools with the
Chapter 5, Problem 34(choose chapter or problem)
Wisconsin ACT math II This plot shows the mean ACT scores for Wisconsin schools with the Milwaukee schools removed. The vertical lines show the mean, mean - 1s, and mean + 1s. a) Describe the shape of the distribution. b) Does a normal model seem appropriate for this distribution? c) 68.9% of the school average scores are between the two outer lines. Does that support or refute your answer to part b? d) Below, a normal model with mean 21.910 and standard deviation 1.539 is drawn over the histogram. Explain how this demonstrates George Boxs statement, All models are wrongbut some are useful.
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