The growing season for random sample of 35 US cities wew recorded,yeilding a sample mean of 190.7 days and the population standard deviation of 54.2...

The growing season for random sample of 35 US cities wew recorded,yeilding a sample mean of 190.7 days and the population standard deviation of 54.2 days. Estimate the tru mean population of the growing season with 95% confidence