Usage Note 22941: How do I fix the error "A subgroup sample size greater than 25 was encountered"?
When this message appears:
ERROR: A subgroup sample size greater than 25 was encountered for
process variable <varname>.
then you need to use the XSCHART or SCHART statement instead of the XRCHART or
RCHART statement. If you specify a chart that uses ranges and has subgroup sample
sizes greater than 10, the following messages appear in the SAS log:
WARNING: A subgroup sample size greater than 10 was encountered for
process variable <varname>.
NOTE: For subgroup sample sizes greater than 10, it is statistically more
efficient to base control limits on subgroup standard deviations
rather than subgroup ranges.
Operating System and Release Information
*
For software releases that are not yet generally available, the Fixed
Release is the software release in which the problem is planned to be
fixed.
| Type: | Usage Note |
| Priority: | low |
| Topic: | Analytics ==> Statistical Process Control
SAS Reference ==> Procedures ==> SHEWHART
|
| Date Modified: | 2007-11-05 13:41:24 |
| Date Created: | 2002-12-16 10:56:45 |
