Kourosh Ks
2010-Jun-01 15:45 UTC
[R] When normality test violate and sample size is large(n=400) can I use t-test
Dears
When normality test violate and sample size is large(n=400) can I use t-test?
best gards kourosh
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Robert A LaBudde
2010-Jun-01 20:43 UTC
[R] When normality test violate and sample size is large(n=400) can I use t-test
At 11:45 AM 6/1/2010, Kourosh Ks wrote:>Dears > When normality test violate and sample size is large(n=400) can I > use t-test? >best gards kouroshGenerally "yes", unless there is something really pathological about the distribution. You should note that, for n = 400, even the simplest distribution-free tests should have near perfect power, so which test you use is not important. ===============================================================Robert A. LaBudde, PhD, PAS, Dpl. ACAFS e-mail: ral at lcfltd.com Least Cost Formulations, Ltd. URL: http://lcfltd.com/ 824 Timberlake Drive Tel: 757-467-0954 Virginia Beach, VA 23464-3239 Fax: 757-467-2947 "Vere scire est per causas scire"