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The ages of a group of 141 randomly selected adult females have a standard deviation of...

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Basic Math

The ages of a group of 141 randomly selected adult females havea standard deviation of 18.9 years. Assume that the ages of femalestatistics students have less variation than ages of females in thegeneral? population, so let ?=18.9years for the sample sizecalculation. How many female statistics student ages must beobtained in order to estimate the mean age of all femalestatistics? students? Assume that we want

95?% confidence that the sample mean is within? one-half year ofthe population mean. Does it seem reasonable to assume that theages of female statistics students have less variation than ages offemales in the general? population?

Answer & Explanation Solved by verified expert
3.6 Ratings (675 Votes)
SolutionGiven 189 Population SDE 12 05 Margin of errorc 95 095 confidence levelFind sample size requiredc 095 1 c    See Answer
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