Question 1: You want to compute a confidence interval to estimate the average time a patient spends in an exam room before their doctor arrives. If you want your confidence level to be 94%, what critical value , z*, do you need to use
Question 2: Suppose an inspector for a consumer advocate group believes the Coca-Cola company puts less than 12 ounces of liquid in each can of Coca-Cola it produces. It is known that the standard deviation for the amount of liquid in a can is ð = 0.25 ounces. The inspector takes an SRS of 50 cans of Coca-Cola, finds that the average amount (sample mean) of the liquid is 11.9 ounces, and computes a 95% confidence interval. What number is at the middle (or center) of the confidence interval?