Statistical Analysis Lab (3D)

Drag a dot, the yellow mean pole or an orange SD handle

Fitted normal curve Show 1 and 2 SD bands

Sample statistics (live)

Running mean (law of large numbers)

Front row: your sample as stacked dots (cyan within 1 SD, amber 1-2 SD, red beyond 2 SD). Back row: histogram of sample means; it follows N(mu, sigma/sqrt(k)) by the central limit theorem. 95% CI uses Student t.