STATISTICS AND GROUPS
This is about groups shot with a rifle or pistol, the measurement of those groups, Statistics applied, and the conclusions that can be made. It’s as simple and non-mathematical as I can make it.
1 A GROUP SIZE MODEL
Much of the Statistics here is based on a model of group size, that assumes that groups are round, and that X and Y deviations are distributed random Normal. This model is available on request, should anyone be interested.
2 GROUP SIZE ESTIMATES
Sample groups are shot and measured to estimate the population group size. Think of the population group size as the long-term average, average group size of a zillion groups shot. The more groups that are shot, the closer the sample group average is to the population group average.
Example, 5-shot groups: