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Chapter 8: Q 74. (page 543)

Catching goldfish for schoolCarly and Maysem plan to be preschool teachers after they graduate from college. To prepare for snack time, they want to know the mean number of goldfish crackers in a bag of original-flavored goldfish. To estimate this value, they randomly selected12 bags of original-flavored goldfish and counted the number of crackers in each bag. Here are their data:

Construct and interpret a 95% confidence interval for the true mean number of crackers in a bag of original- flavored goldfish.

Short Answer

Expert verified

The confidence interval is(326.05,337.28).

Step by step solution

01

Given Information

It is given that data set is:

317,330,325,323,335,337,324,342,330,349,335,333

02

Concept Used

Formula Used is:

x炉-ta2,n-1脳sn<渭<x炉+ta2,n-1脳sn

03

Calculation and Interpretation

  • In MINTAB Sheet, enter data set.
  • Press Stat>Basic Statistics>1-Sample t.
  • Choose samples in Column. Select data.
  • In confidence interval, enter 95%.
  • Press OK.

Confidence Interval is (326.05,337.28)

There is 95%confidence that true mean lies between326.05and337.28.

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