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Back to 8.2 A Single Population Mean Using the Student's t-Distribution

8.2 Exercise 40

Avg difficulty 2.5


Use the following information to answer the next two exercises: A quality control specialist for a restaurant chain takes a random sample of size 12 to check the amount of soda served in the 16-oz serving size. The sample mean is 13.30, with a sample standard deviation of 1.55. Assume the underlying population is normally distributed.

Find the 95 percent confidence interval for the true population mean for the amount of soda served.

  1. (12.42, 14.18)
  2. (12.32, 14.29)
  3. (12.50, 14.10)
  4. Impossible to determine

OpenStax Statistics, 8.2 A Single Population Mean Using the Student's t-Distribution, exercise 40

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Adapted from Statistics © 2022 Rice University. Licensed under CC BY 4.0. Source: Statistics. Imported at revision 7dea80a.