Statistics & Probability

28 tools · Descriptive stats, distributions, probability, and inference.

Open Scientific Lab Open Graph Lab

All Calculators Calculus Algebra Geometry Statistics & Probability

Average Calculator

Calculate mean average of numbers.

Standard Deviation Calculator

Calculate sample standard deviation.

Permutation Calculator

Calculate permutations (nPr).

Combination Calculator

Calculate combinations (nCr).

Median Calculator

Find the median of a data set.

Mode Calculator

Find the mode(s) of a data set.

Variance Calculator

Calculate sample or population variance.

Percentile Calculator

Find a percentile from a data set.

Quartile Calculator

Compute Q1, Q2, and Q3.

Interquartile range (Q3 − Q1).

Z-Score Calculator

Compute z-scores from mean and standard deviation.

Normal Distribution Calculator

PDF and CDF for the normal distribution.

Binomial Distribution Calculator

Binomial PMF and cumulative probability.

Poisson Distribution Calculator

Poisson PMF and cumulative probability.

Probability Calculator

Basic probability from favorable and total outcomes.

Regression Calculator

Simple linear regression (least squares).

Correlation Calculator

Pearson correlation coefficient.

Covariance Calculator

Sample covariance of paired data.

Confidence Interval Calculator

Mean confidence interval for known or sample σ.

Sample Size Calculator

Estimate sample size for a proportion or mean.

Standard Error Calculator

Standard error of the mean.

T-Score Calculator

Compute t-scores from sample statistics.

Bayes Theorem Calculator

Compute posterior probability P(H|E).

Hypothesis Test Calculator

One-sample z/t style test with approximate p-value.

Expected Value Calculator

Compute E[X] from values and probabilities.

Hypergeometric Distribution Calculator

Hypergeometric PMF P(X=k).

Pascal's Triangle Calculator

Generate rows of Pascal's triangle.

Chi-Square Calculator

Chi-square goodness-of-fit statistic.