Sample Sizes Needed for 5% Error Margin

Sample Sizes Needed for 5% Error Margin (Suskie, 2018) Number of students from which to draw samples Random sample size


1000 278 500 217 350 184 200 132 100 80 50 44

Gather Step 2: Decide How Much Data You Need

How much data is enough? Focus on what you need to make decisions

When considering how much evidence you should collect, consider the overall question that guides the inquiry, and how the results will be applied. If you are planning a programmatic overhaul, then you’ll probably want a larger sample with a lower error margin. However, the larger the sample, the greater the commitment of time required from faculty.