When entering the confidence level value, the number should be expressed in a decimal format, such as .95.
A positive value for the margin of error must also be entered.
A positive value for the population standard deviation must also be entered.
Enter a value for the population size only if sampling is done without replacement from a finite population. (The population size is usually unknown, and if no entry is made for the population size, it is assumed that sampling is done with replacement or the population size is infinite or very large.)
Click on the Evaluate button to obtain the results.
To close the window, click on the X at the top of the module window.