Aldo F Costa

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Questions related from Aldo F Costa

Can Inferential Statistics be carried out in a Retrospective Study?

In a retrospective study based on reviewing clinical files, should I run inferential statistical tests even if no power calculation could be made to determine the required sample size before the...

06 June 2017 8,270 3 View

How to set numerical data in quartiles and analyze differences of other variables between them on SPSS?

I need to compare differences of distributions across quartiles of a numerical variables. It is kind of laborious to frst set the quartiles, then split the data on a new variable as a categorical...

06 June 2017 3,723 2 View