SOLUTION: A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students spend doing homework per week. Suppose she knows that the standard deviat

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Question 861061: A researcher wants to determine a 95% confidence interval for the mean number of hours that UMKC students
spend doing homework per week. Suppose she knows that the standard deviation for hours spent per week
by all UMKC students doing homework is 7. She allows the estimate to be within 1.5 hours of the population
mean.
(a) What is the maximum error of estimate she allows?
(b) How large a sample should the researcher select so that the estimate will be within 1.5 hours of the
population mean?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

ME =+1.96%287%2Fsqrt%28n%29%29+=+1.5

            n = %281.96%2A7%2F1.5%29%5E2 = 82 rounded Up