12th Edition

ISBN: 9780321837936

Author: Mario F. Triola

Publisher: PEARSON

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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 4.4, Problem 15BSC

Pre-Employment Drug Screening. In Exercises 13–16, use the test results summarized in Table 4-1, reproduced here. Consider an event to be “unlikely” if its probability is 0.05 or less.

Chapter 4.4, Problem 15BSC, Pre-Employment Drug Screening. In Exercises 1316, use the test results summarized in Table 4-1,

15. Pre-Employment Drug Screening If 3 of the 1000 test subjects are randomly selected, find the probability that they all had correct test results (either true positive or true negative). Is such an event unlikely?

a. Assume that the 3 selections are made with replacement.
b. Assume that the 3 selections are made without replacement.

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Chapter 4.4, Problem 14BSC

Chapter 4.4, Problem 16BSC

Chapter 4 Solutions

Elementary Statistics

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Solution Summary: The author explains the probability that all 3 had correct test results (either true positive or true negative) by assuming that the 3 selections are made with replacement.

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Chapter 4 Solutions