Posts Tagged ‘ t-test ’

Best of SAS: A Personal Nomination 2012

December 31, 2012
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Best of SAS: A Personal Nomination 2012

There SAS applications/procedures/features were not necessarily available since 2012. This year I paid special attention to them when began to use SAS 9.3. The following notes are  totally my personal endorsement purely based my own experience as a user: XML File Reading: SAS XML Mapper SAS XML Mapper itself is not an elegant tool...
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Statistical Notes (2): Equivalence Testing and TOST (Two One-Sided Test)

September 13, 2012
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Statistical Notes (2): Equivalence Testing and TOST (Two One-Sided Test)

Programmers Need to Learn Statistics Or I will Kill Them All –Zed A. Shaw In an equivalence testing example against lognormal data,  a TOST (Two One-Sided Test)  option used in SAS TTEST procedure: proc ttest data=auc dist=lognormal tost(0.8, 1.25);    paired TestAUC*RefAUC; run; And the output: Since the 90% (who not 95%? see below) limit...
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Example 8.34: lack of robustness of t test with small n

April 12, 2011
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Tim Hesterberg has effectively argued for a larger role for resampling based inference in introductory statistics courses (and statistical practice more generally). While the Central Limit Theorem is a glorious result, and the Student t-test remarkabl...
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This is your Science Fair, on SAS

January 26, 2011
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This is your Science Fair, on SAS

Last week I talked about how I volunteered to serve as a judge for a middle-school science fair. As I expected, I enjoyed the experience quite a bit, and I hope the students got something positive from me as well. I evaluated several really impr...
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