The Basic Practice of Statistics
The Basic Practice of Statistics
8th Edition
ISBN: 9781319042578
Author: David S. Moore, William I. Notz, Michael A. Fligner
Publisher: W. H. Freeman
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Chapter 16.4, Problem 10AYK

(a)

To determine

To find: The 90% confidence interval for μ based on the sample

(b)

To determine

To identify: The margin of error for the 90%, confidence

To explain: How the decreasing in the confidence level changes the margin of error of a confidence interval when the sample size and population standard deviation remain the same.

(c)

To determine

To identify: The margin of error for the 95% confidence for SRS of just 100 high school seniors.

(d)

To determine

To explain: How the decrease in the sample size changes the margin of error of a confidence interval when the confidence level and population standard deviation remain the same.

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