Note: This page now accepts data where either a comma (,) or point (.) is used as the decimal separator.
This utility calculates summary statistics for a column of data, grouped by a category variable.
Inputs are the desired level of confidence in the estimate and two columns
of data (including a header row with labels for each column).
The first column is the category variable and the second is the continuous variable.
The program outputs a range of summary statistics relating to the data for each group
in the category variable and overall.
Note:
 for groups with 3 or less observations it is not possible to calculate
ShapiroWilks W statistic to test for normality of distribution
 for groups with only one observation or with standard deviation = 0
histograms and quantile plots are not shown.
 missing values in the data will be omitted from calculations.
