🎲 Caution

P-Hacking Simulator

Watch yourself get fooled by random noise.

📊 Foundation

P-Values

Everyone reports p-values. Almost no one interprets them correctly.

📈 Application

Reading Regressions

Seven numbers define every regression output. Learn what each one means, where it comes from, and how to compute it yourself.

⚖️ Design

Sample Size & Power

How many observations do you need? Power analysis finds the Goldilocks number — large enough to detect real effects, small enough not to waste resources.

📐 Reference

T-Distribution Table

Critical values for the Student’s t-distribution. Find the t-value you need for any degrees of freedom and significance level.

📏 Reference

F-Distribution Table

Critical values for the F-distribution. Used in ANOVA, regression significance tests, and variance comparisons.