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Back to 8.4 Calculating the Sample Size n: Continuous and Binary Random Variables

8.4 Exercise 27

Avg difficulty 2.5

Use the following information to answer the next 14 exercises: The mean age for all Foothill College students for a recent Fall term was 33.2. The population standard deviation has been pretty consistent at 15. Suppose that twenty-five Winter students were randomly selected. The mean age for the sample was 30.4. We are interested in the true mean age for Winter Foothill College students. Let X = the age of a Winter Foothill College student.

________ = 15

OpenStax Introductory Business Statistics 2e, 8.4 Calculating the Sample Size n: Continuous and Binary Random Variables, exercise 27

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Adapted from Introductory Business Statistics 2e © 2023 Rice University. Licensed under CC BY 4.0. Source: Introductory Business Statistics 2e. Imported at revision 50ec917.