Aldo F Costa

3 Questions 14 Answers 0 Followers

Questions related from Aldo F Costa

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...

28 June 2017 6,331 2 View

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...

02 June 2017 9,014 3 View

How many authors a meta-analysis must have?

It is ok if just one person writes a meta-analysis?. Didn´t find any contraindications on PRISMA guidelines.

22 March 2016 6,554 12 View