Maurice Tutor

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    Argosy University/ Phoniex University/
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Category > Management Posted 29 Jan 2018 My Price 4.00

interval estimate

3.      A simple random sample of 60 items resulted in a sample mean of 80. The population standard deviation is σ = 15.

a.      Compute the 95% confidence interval for the population mean.

b.      Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean.

c.       What is the effect of a larger sample size on the interval estimate?

4.      A 95% confidence interval for a population mean was reported to be 152 to 160. If σ = 15, what sample size was used in this study?

Answers

Maurice Tutor
(5)
Status NEW Posted 29 Jan 2018 12:01 AM My Price 4.00

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