7th Edition

ISBN: 9781305254060

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Cengage Learning

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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 7, Problem 23CR

Basic Computation: p ^ Distribution Suppose we have a binomial distribution with n = 24 trials and probability of success p = 0.4 on each trial. The sample proportion of successes is p ^ = r / n .

(a) Is it appropriate to approximate the p distribution with a normal distribution? Explain.

(b) What are the values of μ p ^ and σ p ^ .?

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 7, Problem 22CR

Chapter 7, Problem 24CR

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Chapter 7 Solutions

Understanding Basic Statistics

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