Probability/Statistics Calculators

P-Value Calculator

Calculator will find p-value for two-tailed, right-tailed and left-tailed tests from normal, Student's (T-distribution), chi-squared and Fisher distributions (F-distribution).

Average (Mean) Calculator

For a given group of numbers calculator will find their average (mean) with steps shown.

Sample/Population Standard Deviation Calculator

For a given set of observations calculator will find their standard deviation (either sample or population) with steps shown.

Sample/Population Variance Calculator

For a given set of values calculator will find their variance (either sample or population) with steps shown.

Median Calculator

Caclulator will find median for a given sample data with steps shown.

Mode Calculator

For a given set of data calculator will find mode with steps shown.

Percentile Calculator

For a given set of data calculator will find `p`th percentile with steps shown.

Binomial Distribution Calculator

Calculator will find binomial and cumulative probabilities, as well as mean, variance and standard deviation of binomial distribution.

Poisson Distribution Calculator

Calculator will find poisson and cumulative probabilities, as well as mean, variance and standard deviation of Poisson distribution.

Hypergeometric Distribution Calculator

Calculator will find hypergeometric and cumulative probabilities, as well as mean, variance and standard deviation of hypergeometric distribution.

Z-Score Calculator

Calculator will find a z-score (standardized score), given an unstandardized value, mean and standard deviation of the population with steps shown.

Margin of Error Calculator

Calculator will find margin of error from given sample size and distrinution, with steps shown.

Normal Distribution Calculator

For given mean and standard deviation, calculator will find various probabilities for a random variable, and vice versa: for specified probability it will find values of random variable.

Geometric Distribution Calculator

Calculator will find simple and cumulative probabilities, as well as mean, variance and standard deviation of geometric distribution.