About the Planner
The sample planner is designed to help you determine the sample size you will need for a quantitative study.
Choose the level of confidence you require in the results, either 95% (a 1 in 20 chance of the results falling outside the given range), or 99% (a 1 in 100 chance).
Enter a percentage subsample number between 1 and 50, normally you would leave this at 50 which is the worst case scenario i.e. 50% of the respondents said option 1 and 50% said option 2 so there would be no clear choice.
1. Enter the sample size you want to use and click the Get Accuracy button
2. Enter the accuracy and click the Get Sample Size button.
Read more about Statistical Confidence.