Posted by
Anthony Babinec on
URL: http://spssx-discussion.165.s1.nabble.com/Shapiro-Wilks-Statistic-tp5739693p5739695.html
Do not know if this is the case in Harley's situation, but there
are some requirements in order to produce the statistic. From syntax
guide(v27):
NPPLOT. Normal and detrended Q-Q plots with the Tests of Normality table
presenting Shapiro-Wilk's
statistic and a Kolmogorov-Smirnov statistic with a Lilliefors significance
level for testing normality. If noninteger
weights are specified, the Shapiro-Wilk's statistic is calculated when the
weighted sample size lies
between 3 and 50. For no weights or integer weights, the statistic is
calculated when the weighted
sample size lies between 3 and 5,000.
Tony Babinec
-----Original Message-----
From: SPSSX(r) Discussion <
[hidden email]> On Behalf Of Bruce
Weaver
Sent: Wednesday, September 30, 2020 12:24 PM
To:
[hidden email]
Subject: Re: Shapiro-Wilks Statistic
Hello Harley. I copied your syntax, changed F1 to the name of a variable in
the data file I had open, and ran it. The Tests of Normality table it
generated showed both K-S and S-W tests.
Why do you want to test for normality?
Baker, Harley wrote
> Colleagues,
>
> I am trying to get the Shapiro-Wilks Statistics and having a difficult
> time in SPSS v27 (Mac; release 27.0.0.0; 64-bit) running on Catalina.
> According to the manual, the following syntax (generated by
> point-and-click methods) should work. It produces the K-S test, but
> not W-S test:
>
> EXAMINE VARIABLES=F1
> /PLOT BOXPLOT HISTOGRAM NPPLOT
> /COMPARE GROUPS
> /MESTIMATORS HUBER(1.339) ANDREW(1.34) HAMPEL(1.7,3.4,8.5) TUKEY(4.685)
> /PERCENTILES(5,10,25,50,75,90,95) HAVERAGE
> /STATISTICS DESCRIPTIVES EXTREME
> /CINTERVAL 95
> /MISSING LISTWISE
> /NOTOTAL.
>
> What am I doing/not doing such that the Shapiro-Wilks test statistic
> is not produced? What do I do to fix it?
>
> Thanks!
>
> Harley
>
> Dr. Harley Baker
> Professor Emeritus of Psychology
> California State University Channel Islands One University Drive
> Camarillo, CA 93012
-----
--
Bruce Weaver
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