3 Problem # 2 ( 25 pts). Listed below are amounts of coffee (in ounces) randomly selected from different vending machines made by the Newton Machine Company. Use the sample results to construct a 95% confidence interval for the mean amount of coffee in all dispensed cups. Assume that the population is normally distributed. 11.5 10.8 9.7 13.0 11.5 11.1 13.2 11.1 11.1 12.6 Hint: a) Find the sample mean and the sample standard deviation (You can use the sample computational formula to find s). B) Use the t-distribution to find the critical value. Recall that n is the size of the sample. C) Estimate the population mean. (See PPT slides in Module 10)