SOLUTION: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately
σ
=
62.4
. We w
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-> SOLUTION: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately
σ
=
62.4
. We w
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Question 1175528: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers believe the population standard deviation is approximately
σ
=
62.4
. We would like to be 99.5% confident that the esimate is within 2.5 of the true population mean. How large of a sample size is required? Answer by ewatrrr(24785) (Show Source):
Hi
Normal distribution: σ = 62.4
to be 99.5% confident that the estimate is within 2.5 of the true population mean.
How large of a sample size is required? invNorm(.995) = 2.5758
ME = 0r n =
n = = 4134 (rounded up to whole number)
Wish You the Best in your Studies.
