Re: Question About Tests of Normality and Choice of Statistical Analysis

Posted by bdates on Dec 31, 2014; 6:32pm
URL: http://spssx-discussion.165.s1.nabble.com/Question-About-Tests-of-Normality-and-Choice-of-Statistical-Analysis-tp5728302p5728311.html

Thanks Art and Bruce. This has been my position all along, especially given the robust nature of the t-test with regards to non-normality. My question was a result of a discussion/disagreement with a colleague with whom I teach stats (me in the Fall, him in the Winter). Bruce...thanks for the presentation. It's great! The listserve ought to download and save it. To all, a Happy New Year.

B
________________________________________
From: SPSSX(r) Discussion [[hidden email]] on behalf of Bruce Weaver [[hidden email]]
Sent: Wednesday, December 31, 2014 11:39 AM
To: [hidden email]
Subject: Re: Question About Tests of Normality and Choice of Statistical Analysis

Hi Brian.  My thoughts on testing for normality as a precursor to a
parametric test are summarized in a conference presentation I gave a few
years ago.  A PDF of the slides can be found here:

https://www.nosm.ca/uploadedFiles/Research/Northern_Health_Research_Conference/Weaver,%20Bruce_Silly%20or%20Pointless%20Things.pdf

Cheers & Happy New Year.
Bruce



bdates wrote

> With regard to tests of normality such as Kolmogorov-Smirnov,
> Shapiro-Wilk, Anderson-Darling, etc., is anyone out there using the
> results to determine whether to perform a parametric (e.g., t-test) or
> non-parametric (e.g., Mann-Whitney U) on a dataset?  If the data are
> interval, but are found not normal according to one of these tests, is
> that enough to discard a parametric statistic?  Thanks.
>
> Brian
>
> Brian Dates, M.A.
> Director of Evaluation and Research | Evaluation & Research | Southwest
> Counseling Solutions
> Southwest Solutions
> 1700 Waterman, Detroit, MI 48209
> 313-841-8900 (x7442) office | 313-849-2702 fax

> bdates@

> <mailto:

> bdates@

> > | www.swsol.org<http://www.swsol.org/>
>
>
> =====================
> To manage your subscription to SPSSX-L, send a message to

> LISTSERV@.UGA

>  (not to SPSSX-L), with no body text except the
> command. To leave the list, send the command
> SIGNOFF SPSSX-L
> For a list of commands to manage subscriptions, send the command
> INFO REFCARD





-----
--
Bruce Weaver
[hidden email]
http://sites.google.com/a/lakeheadu.ca/bweaver/

"When all else fails, RTFM."

NOTE: My Hotmail account is not monitored regularly.
To send me an e-mail, please use the address shown above.

--
View this message in context: http://spssx-discussion.1045642.n5.nabble.com/Question-About-Tests-of-Normality-and-Choice-of-Statistical-Analysis-tp5728302p5728308.html
Sent from the SPSSX Discussion mailing list archive at Nabble.com.

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD