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A researcher wants to determine a 97 confidence interval

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A researcher wants to determine a 97% confidence interval for the mean number of hours that UIUC students spend doing homework per week. Suppose she know that the standard deviation for hours spent per week by all UIUC 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 the 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?

Reference no: EM13615855

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