Isabella wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 30 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 42. Assume the population standard deviation is 7.7. What is the 99% 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 2 decimal places where possible. μ

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