|
Back to Summary
Distcomp:
The distcomp application is used to calculate and display the differences between two data sets, or one
data set and a series of other data sets. The software support histograms, probability plots,
cumulative distributions, P-P plots and Q-Q plots.
Seven sample populations are displayed in this data set. This figure shows the cumulative distribution of
each sample set. For this data set, the individual sets are clearly different. If the sets were from
the same population, one would expect the lines to roughly overlap.
Click for full size image
|
 |
Probability plot are useful for determining is sample sets are normally distributed; one would expect
the sample points to form a single, nearly straight line. The individual sets are clearly from
different populations, and one might argue some of the sets should be split into multiple sets (composed
of two, or more, straight line segments).
Click for full size image
|
 |
This figure shows a non-traditional line histogram.
Click for full size image
|
 |
This is a Q-Q plot of the same data.
Click for full size image
|
 |
Back to Summary
|