A simple tool designed for students to calculate how many trials, measurements, respondents, or samples are needed to ensure statistical validity before beginning experimental work.
Select Experiment Type:
Experimental Science Rationale: For plant growth, microbiology, or physical experiments, a huge population sample like 385 is NOT required. Instead, use controlled replication—aiming for at least 3 to 5 trials or replicates per group to allow calculation of standard deviation and statistical significance.
Total group size. Recalculates using finite population correction.
