Resources · Interactive

Statistics you can touch

Live simulators to understand concepts visually. Move the sliders, watch everything change, and stop memorizing formulas.

01 · Normal distribution

Normal distribution explorer

Change the mean (μ) and the standard deviation (σ) and watch how the bell curve shifts and reshapes. The coloured area is the probability of falling between the two cut points.

Live
Mean μ 0
Std. deviation σ 1
Left cut -1
Right cut 1
P(a < X < b)0.68
Left Z · Right Z-1.00 · 1.00
02 · Linear regression

How a line fits the data

Generate data with the slope, intercept and noise you choose, and see how the least-squares line searches for the best fit. R² tells you how much it explains.

Live
Slope β₁ 1
Intercept β₀ 0
Noise (σ) 1
No. of observations 40
R²—
Equationy = —
03 · Calculator

How big a sample do I need?

A quick calculator for sample size in proportion estimation (surveys). For something more serious, get in touch and we'll work it out properly.

Calculator
Required sample size
370
surveys to detect significant differences