topic Re: no Shapiro-Wilk test in SAS Programming

no Shapiro-Wilk test

GDzws — Wed, 03 Aug 2022 15:23:36 GMT

Dear all

I am having trouble with obtaining a normality test result using the Shapiro-Wilk test.

I perform like this:

proc univariate data=bbbbb;
var Weight_kg_Base Height_m_Base Systolic_BP_mmHg_Base Diastolic_BP_mmHg_Base;
histogram Weight_kg_Base Height_m_Base Systolic_BP_mmHg_Base Diastolic_BP_mmHg_Base / normal;
run;

the sample size is 60. But no Shapiro-Wilk test results in my output interface.

I'd really appreciate if anyone could help me.

Thanks in advance.

Re: no Shapiro-Wilk test

FreelanceReinh — Wed, 03 Aug 2022 15:41:01 GMT

Hello @GDzws and welcome to the SAS Support Communities!

Add the NORMAL option to the PROC UNIVARIATE statement:

proc univariate data=bbbbb normal;

Then you should find the Shapiro-Wilk test results in section "Tests for Normality" of the output (not in the section "Goodness-of-Fit Tests for Normal Distribution") if your sample size is 2000 or less.

Re: no Shapiro-Wilk test

Reeza — Wed, 03 Aug 2022 15:43:20 GMT

Add the NORMAL option to your PROC UNIVARIATE statement.

NORMAL
NORMALTEST

requests tests for normality that include a series of goodness-of-fit tests based on the empirical distribution function. The table provides test statistics and p-values for the Shapiro-Wilk test (provided the sample size is less than or equal to 2,000), the Kolmogorov-Smirnov test, the Anderson-Darling test, and the Cramér–von Mises test. This option does not apply if you use a WEIGHT statement.

@GDzws wrote:

Dear all

I am having trouble with obtaining a normality test result using the Shapiro-Wilk test.

I perform like this:

proc univariate data=bbbbb;
var Weight_kg_Base Height_m_Base Systolic_BP_mmHg_Base Diastolic_BP_mmHg_Base;
histogram Weight_kg_Base Height_m_Base Systolic_BP_mmHg_Base Diastolic_BP_mmHg_Base / normal;
run;

the sample size is 60. But no Shapiro-Wilk test results in my output interface.

I'd really appreciate if anyone could help me.

Thanks in advance.

Re: no Shapiro-Wilk test

GDzws — Wed, 03 Aug 2022 15:50:56 GMT

You are right. Thank you so much! Really appreciate!