iStatistics is a feature-rich statistics application that can perform a wide variety of 1-variable and 2-variable statistical analyses including a test for randomness, mean, median and mode calculation, and calculating linear and polynomial regression curves.

Complete Feature List:

1-Variable Analyses:
-Sum of values
-Arithmetic mean
-Geometric mean
-Harmonic mean
-Minimum, lower quartile, median, upper quartile, and maximum
-Mode (or multiple modes if applicable)
-Variance
-Standard deviation
-Statistical randomness test

2-Variable Analyses:
-Linear Regression:
-R value
-F statistic
-Explained sum of squares
-Unexplained sum of squares
-Unexplained mean square

-Polynomial (curvilinear) Regression:
-R squared value
-F statistic
-Explained sum of squares
-Explained mean square
-Unexplained sum of squares
-Unexplained mean square