- Thread starter daniel
- Start date

The Shapiro-Wilk test is implemented in R via the following command:

shapiro.test()

Some statisticians argue that visual inspection is sufficient to make the 'normality' assumption. However, tests such as the Shapiro-Wilk are frequently used.

-Matt

Hi Matt

I don't think that I will plot the graph and visual check. I will use software

for Shapiro-Wilk test. Do you know which stat software which is easy to use. SAS ? Systat ? SPSS?

Currently I have SAS JMP in my desktop. I will explore more to check this software.

Thanks million for your valuabel advice

Daniel

Currently I have SAS JMP in my desktop.

Select your response, add it to the Y, Columns box, OK

Click red triangle next to the response -> Fit Distribution -> Normal

Click red triangle next to Fitted Normal -> Goodness of Fit

This is how the Shapiro-Wilk W test is done, for small data sets.