different shapiro test results

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Tong
Posts: 4
Joined: Mon Aug 16, 2021 12:53 am

different shapiro test results

Post by Tong »

For the same sample data for independent t test, if I run normality test in the modul of indpendent t test and exploaratory/descriptive statistics, you got different W values. Any differences there?
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jonathon
Posts: 2613
Joined: Fri Jan 27, 2017 10:04 am

Re: different shapiro test results

Post by jonathon »

normality in descriptives corresponds to the normality test in the one-sample t-test, rather than the independent samples t-test.

jonathon
Tong
Posts: 4
Joined: Mon Aug 16, 2021 12:53 am

Re: different shapiro test results

Post by Tong »

thanks. When you run independent sample t -test, didn't you do two shapiro tests for both samples? But jamovi only showed a single W/p values of shapiro test in this case, and it was different from the shapiro results by one-sample t-test. What is it for?
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jonathon
Posts: 2613
Joined: Fri Jan 27, 2017 10:04 am

Re: different shapiro test results

Post by jonathon »

no, the shapiro test in the independent samples t-test is on the residuals.

cheers

jonathon
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