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Article #1014Statistical Simulation Experiments
From: Randall D. Tobias
Date: Thu, 05 Oct 1995 00:00
Date: Thu, 05 Oct 1995 00:00
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2120 bytes
I've been looking at a lot of statistical papers reporting simulation
experiments lately and I must say that I'm pretty appalled by
statisticians' disregard of basic design and analysis principles when
it comes to their own experiments. For example, one reference has a
table of 120 empirical p-values, each based on 1000 replications; the
nominal level is 0.05 and the authors flag as unacceptable any p-value
that is bigger than 0.06. But the standard error for the numbers is
about 0.007: you're going to see 8 or 9 p-values bigger than 0.06 on
the basis of chance alone! Questions of multiple inference and power
were not considered at all.
Is there a good source that discusses the design and analysis of
statistical simulations, and especially how to compute and interpret a
relatively large number of empirical p-values? Something that
includes recommendations on sample size and randomization method---ie.
whether or not to use the same random seeds for all experiments--would
be nice.
--
Randy Tobias SAS Institute Inc. sasrdt@unx.sas.com
(919) 677-8000 x7933 SAS Campus Dr. 72450.2545@compuserve.com
(919) 677-8123 (Fax) Cary, NC 27513-2414
Faith, faith is an island in the setting sun.
But proof, yes: proof is the bottom line for everyone.
-- Paul Simon
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10d632,67504efc3d8d30ba,start X-Google-Attributes: gid10d632,public X-Google-Thread: f5efb,67504efc3d8d30ba,start X-Google-Attributes: gidf5efb,public X-Google-Thread: f8fde,67504efc3d8d30ba,start X-Google-Attributes: gidf8fde,public From: sasrdt@shewhart.unx.sas.com (Randall D. Tobias) Subject: Statistical Simulation Experiments Date: 1995/10/05 Message-ID: <DFzByD.90t@unx.sas.com> X-Deja-AN: 117103747 x-nntp-posting-host: shewhart.unx.sas.com sender: news@unx.sas.com (Noter of Newsworthy Events) organization: (none) newsgroups: bit.listserv.stat-l,sci.stat.math,sci.math.stat originator: sasrdt@shewhart.unx.sas.com