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Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her...

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.

< μ <

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.

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