Problem Note 37702: The Satterthwaite assessment might be incorrect for a TOST equivalence test
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For two-sample t tests, when the Pooled equivalence confidence limit falls within the equivalence bounds and the Satterthwaite interval does not, PROC TTEST incorrectly reports an Assessment of "Equivalent" for the Satterthwaite TOST.
Vice versa, when the Pooled equivalence confidence limit does not fall within the equivalence bounds and the Satterthwaite interval does, PROC TTEST incorrectly reports an Assessment of "Not Equivalent" for the Satterthwaite TOST.
Note that the equivalence confidence limits and the "<" and ">" signs themselves are correct.
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | SAS Release | |
| Reported | Fixed* | |||
| SAS System | SAS/STAT | z/OS | 9.2 TS1M0 | 9.2 TS2M3 |
| Microsoft® Windows® for 64-Bit Itanium-based Systems | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows Server 2003 Datacenter 64-bit Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows Server 2003 Enterprise 64-bit Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows XP 64-bit Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft® Windows® for x64 | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows Server 2003 Datacenter Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows Server 2003 Enterprise Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows Server 2003 Standard Edition | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Microsoft Windows XP Professional | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Windows Vista | 9.2 TS1M0 | 9.2 TS2M3 | ||
| 64-bit Enabled AIX | 9.2 TS1M0 | 9.2 TS2M3 | ||
| 64-bit Enabled HP-UX | 9.2 TS1M0 | 9.2 TS2M3 | ||
| 64-bit Enabled Solaris | 9.2 TS1M0 | 9.2 TS2M3 | ||
| HP-UX IPF | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Linux | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Linux for x64 | 9.2 TS1M0 | 9.2 TS2M3 | ||
| OpenVMS on HP Integrity | 9.2 TS1M0 | 9.2 TS2M3 | ||
| Solaris for x64 | 9.2 TS1M0 | 9.2 TS2M3 | ||
A fix for this issue for SAS/STAT 9.21_M1 is available at:
http://ftp.sas.com/techsup/download/hotfix/HF2/A52.html#37702| Type: | Problem Note |
| Priority: | high |
| Topic: | SAS Reference ==> Procedures ==> TTEST Analytics |
| Date Modified: | 2010-03-09 10:47:49 |
| Date Created: | 2009-11-03 13:33:08 |