What is a sample size?

Sample size refers to the number of observations or participants in a product or web experiment. It plays a crucial role in the reliability and accuracy of tests, ensuring that results effectively represent the population you're studying.

How to calculate sample size

Calculating sample size involves considering several factors, including your confidence level, minimum detectable effect, and baseline conversion rate. Inputting these parameters into a sample size calculator helps you determine the minimum number of participants you need to detect a meaningful effect with a certain degree of certainty. This calculation ensures that your experiments are adequately powered to yield statistically significant results, providing reliable insights for decision making.