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Chapter 13: Confidence Intervals – Small Samples
591
Thus the 95% confidence interval estimate for the mean distance, using the
formula, is 29.6667
2.201
1.8722 = 29.6667
4.1207.
That is, we are 95% confident that the average distance commuting students
travel to the campus will be between 25.5463 miles and 33.7877 miles.
We again can also use the
Small Sample Confidence Interval for a Single
Population Mean
workbook to solve the problem. We will have to enter
the data in that section of the workbook. The output is shown in
Figure 13-7
.
Figure 13-7:
Workbook Output with the Confidence
Interval for
Example 13-4
Click here for the Small Sample Confidence Interval for a Single Population Mean Workbook