How large a sample is needed to estimate this mean

Reference no: EM13953424

A researcher wants to estimate the average weight loss obtained by patients at a residential weight-loss clinic during the first week of a controlled diet and exercise regimen. How large a sample is needed to estimate this mean to within 0.5 lb with 95% confidence? Assume that past data indicate a standard deviation of about 1 lb.

Reference no: EM13953424

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