Question

Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 48 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 9.5 and a standard deviation of 2.9.


a) What is the 80% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Enter your answers accurate to one decimal place.

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b) Fill in the answer boxes to complete the interpretation of the confidence interval.


Karen can advertise, with confident that, on average, there are between and chocolate chips in a Big Chip cookie at her bakery.

Answer 1