Mean, median and deviation calculator
Summarize a dataset with an average, median, spread and count.
Open calculatorStatistics & probability
Summarize data, explore chance and understand uncertainty.
Showing 1–16 of 16 tools
Weighted average calculator
Combine values that contribute different amounts to the overall average.
Open calculatorZ-score calculator
Express a value as a number of standard deviations from the mean.
Open calculatorStandard error calculator
Estimate the standard error of a sample mean.
Open calculatorCoefficient of variation calculator
Compare standard deviation with the magnitude of a mean.
Open calculatorMean confidence interval calculator
Calculate a normal z confidence interval when population spread is known.
Open calculatorSurvey sample size calculator
Estimate responses needed for a population proportion with a target margin.
Open calculatorBinomial probability calculator
Find the chance of an exact number of successes in repeated trials.
Open calculatorCombinations calculator
Count unordered selections without replacement.
Open calculatorPermutations calculator
Count ordered selections without replacement.
Open calculatorPoisson distribution calculator
Find exact-count and cumulative probabilities for events in a fixed interval.
Open calculatorHypergeometric probability calculator
Calculate an exact success-count probability for sampling without replacement.
Open calculatorGeometric distribution calculator
Find when the first success occurs in independent trials with a constant probability.
Open calculatorNormal distribution probability calculator
Find the normal area between two bounds and in the tails outside them.
Open calculatorExponential waiting time calculator
Estimate the chance of a wait ending before a chosen time under a constant-rate model.
Open calculatorBayes theorem calculator
Update a prior probability using evidence likelihoods and inspect the expected groups.
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