A study will be done to learn about the sleep habits of American adults. Researchers wish to estimate the mean number of daily sleep hours. The standard deviation is approximately 0.75 hours. How...

A study will be done to learn about the sleep habits of American adults. Researchers wish to
estimate the mean number of daily sleep hours. The standard deviation is approximately 0.75
hours. How large of a sample size in needed for the sample mean to be within 0.1 hours of the
population mean with 90% confidence?