7th Edition

ISBN: 9780134684291

Author: Larson

Publisher: PEARSON CO

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A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 5, Problem 5.5.70RE

In Exercises 69 and 70, determine whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximate the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities.

70. Sixty-five percent of U.S. college graduates are employed in their field of study. You randomly select 20 U.S. college graduates and ask them whether they are employed in their field of study. Find the probability that the number who are employed in their field of study is (a) exactly 15, (b) less than 10, and (c) between 20 and 35. Identify any unusual events. Explain. (Source: Accenture)

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.

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Chapter 5, Problem 5.5.69RE

Chapter 5, Problem 1CQ

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Chapter 5 Solutions

EBK ELEMENTARY STATISTICS

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Solution Summary: The author explains that the normal distribution can be used to approximate the binomial distribution. The sample size is n=20 and the college graduates are employed in the field of study is 0.65.

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