Deon Wants to advertise how many Chocolate chips are in each big chip cookie at his bakery. He randomly selects a sample of 49 cookies and find that the number of Chocolate chips per cookie in the sample has a mean of 11.8 and a standard deviation of 2.8. What is the 80% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Assume the date it is from a normal distributed population brown answers to three decimal places were possible ____