Question
Find the sample size needed to estimate the mean age of movie patrons such that it can be said with 90% confidence that the sample
Find the sample size needed to estimate the mean age of movie patrons such that it can be said with 90% confidence that the sample mean is within 3 years of the population mean. Assume that standard deviation is 19.1 years, based on a previous report. could the sample be obtained from one movie at one theater ?
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Solution Given that standard deviation sigma 191 m...
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Elementary Statistics
Authors: Robert R. Johnson, Patricia J. Kuby
11th Edition
978-053873350, 9781133169321, 538733500, 1133169325, 978-0538733502
