Introduction To Statistics And Data Analysis

6th Edition

ISBN: 9781337793612

Author: PECK, Roxy.

Publisher: Cengage Learning,

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 15.1, Problem 13E

In an experiment to investigate the performance of four different brands of spark plugs intended for use on a 125-cc motorcycle, five plugs of each brand were tested, and the number of miles (at a constant speed) until failure was observed. A partially completed ANOVA table is given. Fill in the missing entries, and test the relevant hypotheses using a 0.05 level of significance. (Hint: See Table 15.2.)

Chapter 15.1, Problem 13E, In an experiment to investigate the performance of four different brands of spark plugs intended for

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Chapter 15 Solutions

Introduction To Statistics And Data Analysis

Ch. 15.1 - Give as much information as you can about the...Ch. 15.1 - Prob. 2E Ch. 15.1 - Employees of a state university system can choose...Ch. 15.1 - The accompanying summary statistics for a measure...Ch. 15.1 - The authors of the paper Age and Violent Content...Ch. 15.1 - The paper referenced in the previous exercise also...Ch. 15.1 - Do people feel hungrier after sampling a healthy...Ch. 15.1 - Prob. 8E Ch. 15.1 - The Paper Womens and Mens Eating Behavior...Ch. 15.1 - Can use of an online plagiarism-detection system...

Ch. 15.1 - Prob. 11E Ch. 15.1 - In the introduction to this chapter, we considered...Ch. 15.1 - In an experiment to investigate the performance of...Ch. 15.2 - Leaf surface area is an important variable in...Ch. 15.2 - Prob. 15E Ch. 15.2 - Prob. 16E Ch. 15.2 - Prob. 17E Ch. 15.2 - The paper referenced in Exercise 15.5 described an...Ch. 15.2 - Prob. 19E Ch. 15.2 - The accompanying data resulted from a flammability...Ch. 15.2 - Do lizards play a role in spreading plant seeds?...Ch. 15.2 - Samples of six different brands of diet or...Ch. 15.3 - A particular county employs three assessors who...Ch. 15.3 - The accompanying display is a partially completed...Ch. 15.3 - With the use of biofuels increasing, investigators...Ch. 15.3 - Prob. 26E Ch. 15.3 - Prob. 27E Ch. 15.3 - Prob. 28E Ch. 15.4 - Prob. 29E Ch. 15.4 - The paper Feedback Enhances the Positive Effects...Ch. 15.4 - The following graphs appear in the paper Which...Ch. 15.4 - The behavior of undergraduate students when...Ch. 15.4 - Prob. 33E Ch. 15.4 - The following partially completed ANOVA table...Ch. 15.4 - Prob. 35E Ch. 15.4 - The accompanying ANOVA table is similar to one...Ch. 15.4 - Identification of sex in human skeletons is an...Ch. 15 - Suppose that a random sample or size n = 5 was...Ch. 15 - Parents are frequently concerned when their child...Ch. 15 - Prob. 40CR Ch. 15 - Consider the accompanying data on plant growth...Ch. 15 - Prob. 42CR Ch. 15 - Prob. 43CR Ch. 15 - Prob. 44CR Ch. 15 - Prob. 45CR Ch. 15 - Prob. 46CR Ch. 15 - Prob. 47CR Ch. 15 - Prob. 48CR Ch. 15 - Prob. 49CR

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Solution Summary: The author explains that the experiment was performed on four different brands of spark plugs, and the number of treatments is 4. The degrees of freedom for treatments are calculated as follows:

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Chapter 15 Solutions