Statistics & probability
A/B tests, sample size, confidence intervals, z-scores, outliers.
10 tools · nothing uploaded
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- PopularA/B Test CalculatorWork out whether a test result is real or noise, with the confidence interval.
- PopularConfidence Interval CalculatorWork out the confidence interval for a set of measurements.
- PopularCorrelation Coefficient CalculatorWork out Pearson r, R² and the line of best fit from two columns.
- PopularDescriptive Statistics CalculatorMean, median, mode, quartiles, skew and outliers from one paste.
- PopularMean Median Mode CalculatorAverage, median, mode, range and deviation.
- PopularOutlier CalculatorFind outliers by IQR, z-score or the robust modified z-score.
- PopularPermutation and Combination CalculatorWork out nCr and nPr, with and without repetition.
- PopularProbability CalculatorWork out combined probabilities for two events, and over repeated trials.
- PopularSample Size CalculatorWork out how many responses a survey or A/B test actually needs.
- PopularZ Score CalculatorTurn a value into a z-score and a percentile.
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