Sigma says...

Guess the standard deviation of a sample.

What's the z?

Guess the z-score of a data point relative to a sample.

Effective d-tective

Guess the effect size (Cohen's d of the difference between two samples.

Sample shuffle

See the means dancing!

Confidence Can-Can

See the confidence intervals dancing!

CI Explorer

Examine how confidence intervals change!

CI Private Eye

Guess the confidence interval for a sample.