SOLUTION: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 59 cookies and finds that the number of chocolate chip

Question 1187310: Karen wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 59 cookies and finds that the number of chocolate chips per cookie in the sample has a mean of 17.9 and a standard deviation of 2.9. What is the 95% confidence interval for the number of chocolate chips per cookie for Big Chip cookies? Enter your answers accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Half-interval is t(0.975,df=58)*2.9/sqrt(59)
=2.001*2.9/sqrt(59)=0.755 or 0.8
The 95% CI is (17.1, 18.7) units choc chips/cookie
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