(a) Explanation Given info : x ¯ = 103.5 , σ = 45 , n = 40 . Calculation: Confidence interval: Software Procedure: Step by step procedure to obtain the 95% confidence interval for the population mean waking times using the MINITAB software: Choose Stat > Basic Statistics > 1-Sample Z . In Summarized data, enter the sample size as 40 and mean as 103.5 . In Standard deviation , enter a value for s as 45 (b) To determine To check : Whether it seems possible that the population mean could be within 10% of the sample mean or not.

Elementary Statistics: Picturing the World (7th Edition)

7th Edition

ISBN: 9780134683416

Author: Ron Larson, Betsy Farber

Publisher: PEARSON

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Chapter 6, Problem 6.1.3RE

(a)

To determine

To construct and interpret: The 90% confidence interval for the population mean waking times.

(b)

To determine

To check: Whether it seems possible that the population mean could be within 10% of the sample mean or not.

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Chapter 6, Problem 6.1.2RE

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Chapter 6 Solutions

Elementary Statistics: Picturing the World (7th Edition)

Ch. 6.1 - In Example 1, the researcher selects a second...Ch. 6.1 - Use the data in Try It Yourself 1 and a 95%...Ch. 6.1 - Use the data in Try It Yourself 1 to construct a...Ch. 6.1 - Use the data in Example 1 and technology to...Ch. 6.1 - Construct a 90% confidence interval for the...Ch. 6.1 - In Example 6, how many student-athletes must the...Ch. 6.1 - When estimating a population mean, are you more...Ch. 6.1 - Which statistic is the best unbiased estimator for...Ch. 6.1 - For the same sample statistics, which level of...Ch. 6.1 - You construct a 95% confidence interval for a...

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To construct and interpret: The 90% confidence interval for the population mean waking times.

Solution Summary: The author explains how to construct and interpret the 90% confidence interval for the population mean waking times using the MINITAB software.

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To construct and interpret: The 90% confidence interval for the population mean waking times.

To check: Whether it seems possible that the population mean could be within 10% of the sample mean or not.

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Chapter 6 Solutions