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Chapter 11: Confidence Intervals – Large Samples
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Figure 11- 23:
Workbook Output with the Sample Size
for
Example 11-16
Observe that the values for the computed sample sizes are the same as when
the formula and the workbook are used. Both values are approximated to 37.
The workbook uses 6 decimal places for
z
/2
in the computations. You
should always use the workbook to compute the sample sizes.
Note:
The formulas for non-equal sample sizes are much more complex
when considering confidence intervals (inferences) for the differences of
population parameters. This situation will not be discussed in this e-book.
Click here for the Large Sample Confidence Interval for the Difference Between Two Population Means Workbook