
Chapter 9
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Options dialogbox, place the required Con dence level and select Proportion ≠ hypothesized
proportion. In this dialog box, from Method select Normal approximation and click OK. The
One-Sample Proportion dialog box will reappear on the screen. Click OK, Minitab output for
Example 9.5 as shown in Figure 9.17 will appear on the screen.
9.7.2 Sample Size Estimation
While conducting any kind of research, the most frequently asked question is what should be
the sample size. Most researchers seem to be perplexed about the sample size. What will be an
appropriate sample size? Should it be a predetermined percentage of the population? Is ...