Probability/Statistics Calculators

P-Value Calculator

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

Average (Mean) Calculator

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

Sample/Population Standard Deviation Calculator

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

Sample/Population Variance Calculator

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

Median Calculator

The calculator will find the median for the given sample data, with steps shown.

Mode Calculator

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

Percentile Calculator

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

Binomial Distribution Calculator

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

Poisson Distribution Calculator

The calculator will find the Poisson and cumulative probabilities, as well as the mean, variance and standard deviation of the Poisson distribution.

Hypergeometric Distribution Calculator

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

Z-Score Calculator

The calculator will find the Z-Score (standardized score), given the unstandardized value, mean and standard deviation of the population, with steps shown.

Margin of Error Calculator

The calculator will find the margin of error from the given sample size and distribution, with steps shown.

Normal Distribution Calculator

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

Geometric Distribution Calculator

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

Percentile Rank, Class Rank Calculator

For the given set of data and score, the calculator will find the percentile class rank, with steps shown.