6th Edition

ISBN: 9781259957598

Author: DOANE

Publisher: RENT MCG

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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 8.7, Problem 39SE

Use the following information— x ¯ = 50 , σ = 15, n = 90, N = 1,000—to calculate confidence intervals for μ assuming the sample is from a normal population: (a) 90 percent confidence; (b) 95 percent confidence; (c) 99 percent confidence.

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Chapter 8.7, Problem 38SE

Chapter 8.7, Problem 40SE

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Chapter 8 Solutions

APPLIED STAT.IN BUS.+ECONOMICS

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Use the following information— x ¯ = 50 , σ = 15, n = 90, N = 1,000—to calculate confidence intervals for μ assuming the sample is from a normal population: (a) 90 percent confidence; (b) 95 percent confidence; (c) 99 percent confidence.

Solution Summary: The author calculates the 90% confidence interval for mu by assuming that the sample is from normal population.

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