Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 47 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 15.4 and a standard deviation of 2.2. a) What is the 98% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Enter your answers accurate to one decimal place.  < μμ <  b) Fill in the answer boxes to complete the interpretation of the confidence interval.

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Author:Amos Gilat
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Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 47 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 15.4 and a standard deviation of 2.2.


a) What is the 98% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Enter your answers accurate to one decimal place.

 < μμ < 

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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