7th Edition

ISBN: 9781323839577

Author: Larson

Publisher: Pearson Custom Publishing

Concept explainers

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear re…

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.

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Textbook Question

Chapter 5, Problem 11CQ

In a survey of U.S. adults, 16% say they have had someone take over their email accounts without their permission. You randomly select 250 U.S. adults and ask them whether they have had someone take over their email accounts without their permission. Use this information in Exercises 11 and 12. (Source: Pew Research Center)

11. Determine whether you can use a normal distribution to approximate the binomial distribution. If you can, find the mean and standard deviation. If you cannot, explain why.

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 10CQ

Chapter 5, Problem 12CQ

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Chapter 5 Solutions

ELEMENTARY STATISTICS W/MYMATHLAB<CUSTM

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Solution Summary: The author determines whether the normal distribution can be used to approximate the binomial distribution. The mean and standard deviation are 40 and 5.797.

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