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Get Full Access to Stats Modeling The World - 4 Edition - Chapter 5 - Problem 34
Get Full Access to Stats Modeling The World - 4 Edition - Chapter 5 - Problem 34

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# Wisconsin ACT math II This plot shows the mean ACT scores for Wisconsin schools with the ISBN: 9780321854018 481

## Solution for problem 34 Chapter 5

Stats Modeling the World | 4th Edition

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Problem 34

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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Statistics 130M Notes January 19, 2017 notes= January 26, 2017 class Tuesday January 24, 2017 Sick- Skipped Class. Sorry All Thursday January 26, 2017 Chapter 3 Numerical descriptive techniques - Allows us to be precise - Most mathematical calculations Information - When interrupting a histogram we focus on shape Population - Described by parameters - Parameters are often written using greek letters Summaries for symmetric distribution - Central tendency o Balancing point/ halfway point o ***should be same**** o Average of mean o Center of symmetric distribution Skewed distribution - Extreme values/ outliers effected the average - Curve killer - Don’t use balancing point Arithmetic mean

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##### ISBN: 9780321854018

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