SOLUTION: Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9. Develop a 99 percent confidence interval for th

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Question 768200: Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9.
Develop a 99 percent confidence interval for the population mean? (Round your answers to 3 decimal places.)

thanks in advance for your help!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9.
Develop a 99 percent confidence interval for the population mean? (Round your answers to 3 decimal places.)
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sample mean = x-bar = 40
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ME = z*s/sqrt(n) = 2.5758*9/sqrt(49) = 3.3118
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99% CI: 40-3.3118 < u < 40+3.3118
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Cheers,
Stan H.
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