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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 16 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 3.3. Find a 90% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Round your answers to one decimal place.  

Math   Statistics-And-Probability   
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