Deon wants to advertise how many chocolate chips are in each Big Chip cookie at his bakery. He randomly selects a sample of 64 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 19.5 and a standard deviation of 3.9. What is the 98% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Assume the data is from a normally distributed population. Round answers to 3 decimal places where possible.