13th Edition

ISBN: 9780134462455

Author: Mario F. Triola

Publisher: PEARSON

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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 9, Problem 4CQQ

In Exercises 1-5, use the following survey results: Randomly selected subjects were asked if they were aware that the Earth has lost half of its wildlife population during the past 50 years. Among 1121 women, 23% said that they were aware. Among 1084 men, 26% said that they were aware (based on data from a Harris poll).

4. Biodiversity When using the given sample data to construct a 95% confidence interval estimate of the difference between the two population proportions, the result of (-0.0659, 0.00591) is obtained from technology.

a. Express that confidence interval in a format that uses the symbol <.

b. What feature of the confidence interval is a basis for deciding whether there is a significant difference between the proportion of women aware of the statement and the proportion of men who are aware?

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Chapter 9, Problem 3CQQ

Chapter 9, Problem 5CQQ

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Solution Summary: The author explains that the confidence interval in a format that uses the symbol indicates that there is no significant difference between two proportions.

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