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Chapter 8: Q. 23 (page 478)

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.

role="math" localid="1648388299408" x炉=_____

Short Answer

Expert verified

The meanX炉=30.4.

Step by step solution

01

Given Information

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.

02

Explanation

In statistics, the x-bar sign, X炉, is used to express the mean of a data set.

Here, the mean age for the sample was 30.4

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