Statistics Calculators

📉 Statistics

Standard Deviation Calculator

Calculate mean, variance, and standard deviation for any data set.

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x̄ Statistics

Mean Calculator

Calculate arithmetic mean, geometric mean, and harmonic mean for any data set.

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M̃ Statistics

Median Calculator

Find the median (middle value) of any data set, sorted and unsorted.

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Mo Statistics

Mode Calculator

Find the mode (most frequent value) of any data set, including multimodal sets.

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σ² Statistics

Variance Calculator

Calculate population and sample variance for any data set.

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🎲 Statistics

Probability Calculator

Calculate basic probability, combined events, and conditional probability.

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Z Statistics

Z-score Calculator

Calculate z-score (standard score) and find corresponding probabilities.

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% Statistics

Percentile Calculator

Calculate percentile rank and find the value at any percentile in a data set.

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🔭 Statistics

Sample Size Calculator

Calculate the required sample size for surveys and statistical studies.

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r Statistics

Correlation Calculator

Calculate Pearson correlation coefficient between two variables.

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📈 Statistics

Regression Calculator

Calculate linear regression equation, slope, and intercept for any data set.

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📊 Statistics

Confidence Interval Calculator

Calculate confidence intervals for means and proportions.

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P Statistics

Permutation Calculator

Calculate the number of permutations P(n,r) — ordered arrangements.

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C Statistics

Combination Calculator

Calculate the number of combinations C(n,r) — unordered selections.

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🎯 Statistics

Binomial Distribution Calculator

Calculate binomial probability P(X=k), cumulative probabilities, mean, and variance.

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📊 Statistics

T-Test Calculator

Perform one-sample, two-sample, and paired t-tests with p-value and confidence interval.

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χ² Statistics

Chi Square Calculator

Calculate chi-square test statistic, p-value, and degrees of freedom for goodness of fit and independence tests.

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🔔 Statistics

Normal Distribution Calculator

Calculate probabilities and percentiles for the normal (Gaussian) distribution.

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📊 Statistics

Poisson Distribution Calculator

Calculate Poisson distribution probabilities for events occurring at a known rate.

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📊 Statistics

Geometric Distribution Calculator

Calculate geometric distribution probabilities for the number of trials until first success.

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📊 Statistics

ANOVA Calculator

Perform one-way ANOVA test to compare means across multiple groups.

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📊 Statistics

Covariance Calculator

Calculate sample and population covariance and correlation coefficient between two datasets.

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⚕️ Statistics

Relative Risk Calculator

Calculate relative risk (risk ratio) from a 2×2 contingency table.

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📊 Statistics

Odds Ratio Calculator

Calculate odds ratio and confidence interval from a 2×2 contingency table.

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± Statistics

Margin of Error Calculator

Calculate the margin of error for survey results given sample size and confidence level.

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