A random sample of size 18 taken from a normally distributed population revealed a sample mean of 100 and a sample variance of 49. The 95% confidence interval for the population mean would equal: a. 97.65 – 107.35 b. 93.56 - 103.98 c. 95.52 -104.65 d. 96.52 – 103.48

A random sample of size 18 taken from a normally distributed population revealed a sample mean of 100 and a sample variance of 49. The 95% confidence interval for the population mean would equal: a. 97.65 – 107.35 b. 93.56 - 103.98 c. 95.52 -104.65 d. 96.52 – 103.48

Essentials of Business Analytics (MindTap Course List)

2nd Edition

ISBN:9781305627734

Author:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson

Publisher:Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson

Chapter2: Descriptive Statistics

Section: Chapter Questions

Problem 13P: Consider a sample with data values of 10, 20, 12, 17, and 16. a. Compute the mean and median. b....

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Question

A random sample of size 18 taken from a normally distributed population revealed a sample mean of 100 and a sample variance of 49. The 95% confidence interval for the population mean would equal:

97.65 – 107.35

93.56 - 103.98

95.52 -104.65

96.52 – 103.48

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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