Explanation Approach: Assume a normal distribution has a mean of μ and a standard deviation of σ . We use the equation z = x − μ σ to convert a value x in the nonstandard distribution to a z -score. Given Information: Mean batting average Standard deviation 1940s .267 .0326 1970s .261 .0317 Joe DiMaggio hit 352 in 1949 and Bill Madlock hit 354 in 1973. Calculation: In 1940, μ = .267 and σ =

6th Edition

ISBN: 9780134434681

Author: Tom Pirnot

Publisher: PEARSON

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 14.4, Problem 70E

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The impressive batting average among Joe DiMaggio and Bill Madlock.

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Chapter 14.4, Problem 69E

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Chapter 14 Solutions

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The impressive batting average among Joe DiMaggio and Bill Madlock.