EasyStat provides easy statistical utilities for the Palm.

By now, its features include:

Chi-square Independence Test (up to 6x5 tables) with (optional) Yates' continuity correction.

Fisher's Exact Test plus Risk and Odd Ratios with confidence intervals.

McNemar's Test with (optional) continuity correction plus conditional odd ratio with confidence interval.

Two sample t Test for paired/unpaired samples and with pooled/unpooled variances; a confidence interval for the difference between means is also given.

Variance Difference Test plus Variance Ratio with confidence interval.

Normal and Binomial confidence intervals.

And more...

Data can be imported from the Memopad (then, mean and standard deviations are also calculated).

Confidence level is customizable for all confidence intervals.

Accurate results are given without the need of Mathlib ;) (You don't need to install Mathlib to use EasyStat, as all needed calculations are performed internally.)