Interactive Tools

Explore statistical concepts hands-on. Each tool runs in your browser — no software to install, no account required. Click any tool to launch it below.

Sampling Explorer

Chapter 2

Draw samples of different sizes and watch how sampling variability changes in real time.

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Correlation Game

Chapter 4

See a scatter plot, guess the correlation coefficient. Build your intuition for what different associations look like.

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Distribution Explorer

Chapters 5 & 6

Adjust parameters of probability distributions and watch shapes change. See the Central Limit Theorem in action.

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CI Simulator

Chapter 7

Generate hundreds of confidence intervals and see how many capture the true parameter. What “95% confidence” actually means.

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Hypothesis Playground

Chapter 8

Set up a hypothesis test, choose your significance level, and explore Type I and Type II errors.

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P-Hacking Simulator

Chapter 8

Run tests on random data until something looks “significant.” The replication crisis in miniature.

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ANOVA Visualizer

Chapter 9

Adjust group means, variability, and sample sizes. Watch the F-statistic and effect size update in real time.

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Regression Explorer

Chapters 10 & 11

Fit regression models, add variables, check residuals. See how the model changes with each decision.

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