If you're conducting a research and wonder how many measurements you need so that it is statistically significant, this sample size calculator is here to help you. All you need to do is ask yourself these three questions before you use it:
Read on to learn how to calculate the sample size using this tool, and what do all the variables in the sample size calculation formula mean.
The equation that our sample size calculator uses is
n₁ = Z² * p * (1-p) / ME²
If your population is finite - for example, you are conducting a survey among students of only one faculty - you need to include a correction in the following form:
n₂ = n₁ / (1 + n₁ / N)
We will analyze a survey case step-by-step so you can get a clear picture of how to use our sample size calculator. You are planning to conduct a survey to find out what is the proportion of students on your campus who regularly eat their lunch at the campus canteen.