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help with statistics homework

Statistics
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A population is estimated to have a standard deviation of 8. We want to estimate the population mean within 2 with 90% level of confidence ____ and ___ how large a sample is required? (Round up your answer to the next whole number) Sample required is

Apr 12th, 2015

Required sample size  =. [ z x sigma /e ] ^2

                                     = (1.645 x 8/2)^2                for 90 % confidence level z= 1.645

                                     =43.2                  select next whole no.    It is 44.

Answer: 44

Apr 12th, 2015

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Niru

Apr 12th, 2015

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Apr 12th, 2015
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