Basic statistical tests and utility functions.

means - Arithmethic, geometric, and harmonic means.   [demo]
parammle - Maximum likelihood parameter estimates for DF_Toolbox.   [demo]
pctile1 - Percentile function (used by summary).   [demo]
pctile2 - Alternative definition percentile function.   [demo]
summary - Summary statistics for a data vector.   [demo]
ttest1 - 1 sample t-test.    [demo]
ttest2e - 2 sample t-test assuming equal variances.   [demo]
ttest2u - 2 sample t-test assuming unequal variances.   [demo]
ttest2p - 2 sample paired t-test.   [demo]