Business Statistics 7th ed chapter 8 question 837 If you wan

Business Statistics 7th ed chapter 8 question 8-37 If you want to be 95% confident of estimating the population proportion to within a sampling error of +- 0.02 and there is historical evidence that the population is approximately 0.40 what sample size is needed?

Solution

To determine the required sample size in Minitab, do as follows:

Step1. Go to Stat> Power and Sample size> Sample size estimation. Select \'Proportion\' in \'Parameter\' text box.

Step2. Enter 0.40 in \'Proportion\' text box and 0.02 in \'Margin of error for confidence interval\' text box. Click OK.

The required sample size is 2382 (displayed in output screen).