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Chapter 11: Confidence Intervals – Large Samples
Figure 11- 16:
Workbook Output with the Confidence
Interval for
Example 11-11
The display shows the 99% confidence interval is 0.0682 to 0.5318, the same
as was obtained by using the formula (to four decimal places).
Sample Sizes Needed to Estimate Two Population Proportions
In considering large-sample confidence interval for the difference between
two population proportions, that is, when
5,
5,
5, and
5, one may need to estimate the sample sizes
needed in order to collect data.
Note:
The formula given here is for when the sample sizes are the same.
Also, this will be the equation for the minimum sample size.
Click here for the Large Sample Confidence Interval for the Difference Between Two Population Proportions Workbook