A sample of 40 randomly selected women is obtained, and the blood platelet count of each subject

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A sample of 40 randomly selected women is obtained, and the blood platelet count of each subject is measured. The mean is 279.5 and the standard deviation is 65.2.

a. Use these sample results to construct a 95% confidence interval estimate of the population mean.

b. What is the margin of error?

c. Write a statement that correctly interprets the confidence interval found in part a.

d. If the standard deviation is 65.2, how many subjects must be included if we want 95% confidence that the sample mean is in error by at most 10?

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Statistical Reasoning for Everyday Life

ISBN: 978-0321817624

4th edition

Authors: Jeff Bennett, Bill Briggs, Mario F. Triola

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Question Posted: Dec 23, 2015 07:47 AM

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A sample of 40 randomly selected women is obtained, and the blood platelet count of each subject

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a The margin of error is The 95 confidence interval isx E 2795 206 2589 to 3001 b The ...View the full answer

Statistical Reasoning for Everyday Life

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