Probability & Distributions

Probability Distributions & Simulation

Calculate probabilities and critical values, explore continuous and discrete distributions, generate random data, and investigate sampling behavior through interactive statistical tools.

For confidence intervals and hypothesis testing, explore our statistical inference tools .

Distribution Explorer

Inspect distribution shapes, theoretical properties, quantiles, cumulative probabilities and tail behavior.

Interactive explorer
Single distribution Compare distributions
Curves

Compare between 2 and 5 distributions or parameter configurations.

Distribution Comparison PDF
t, df = 2 Student's t df = 2
t, df = 5 Student's t df = 5
t, df = 30 Student's t df = 30
Standard Normal Standard Normal No adjustable parameters

Comparison

All curves use the same horizontal and vertical scales for direct visual comparison.