Statistics & Probability
Mean, median, variance, and probability.
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Frequently asked questions
Understand datasets with statistical calculators that keep formulas visible and outputs clear. Compute mean, median, mode, standard deviation, and z-scores. Explore combinations and permutations, and get quick probabilities with common distributions. Ideal for students, analysts, and anyone who needs fast, reliable stats.
Population includes every item; sample is a subset. Use population formulas when you measure all items.
Where helpful, we show the exact formula used and a short explanation.
Choose sample (n−1) or population (n) depending on context.
Yes—outputs are text and easy to share.
Very large lists may be summarized to keep the app responsive.