The US Sugar Industry Association wants to estimate the mean yearly sugar consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds....

The US Sugar Industry Association wants to estimate the mean yearly sugar    consumption. A sample of 16 people reveals the mean yearly consumption to be 60 pounds with a standard deviation of 20 pounds.

 Develop the 90% confidence interval for the population mean.