A quick and dirty statistics calculator that
* determines mean, standard deviation, sum-of-squares, etc
* plots histograms
* performs linear regression
* finds 1,2-tail Gaussian/normal distribution probabilities
* converts defect rates into sigma
* performs t-tests
* finds confidence intervals on proportions.
v1.2) Stats tab facilitates multiple entry of identical data-points through multiple clicks of "add" button.
v1.1) Saves data between sessions