Karen wants to advertise how many chocolate chips are in each
Big Chip cookie at her bakery. She randomly selects a sample of 67
cookies and finds that the number of chocolate chips per cookie in
the sample has a mean of 12.1 and a standard deviation of
3.6.
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 ? 85% 99% 80% confident that,
on average, there are between BLANK and BLANK chocolate
chips in a Big Chip cookie at her bakery.