Statistics – Normality test
Hi, I got a comment from a SPSS developer person that has a LOT of knowledge. He mentioned after my blog post in August about normality, that it’s also possible to make a test of the [...]
Statistics – proportions test or p-test or z-test
When you find that a chi-Square test made on a crosstable has a significant result like this: You then know that there are differences between the distributions in the cross table, in my example [...]
Statistics – one sample chi-square test
Hi, many times (specially during my Statistical trainings), user ask me why they could find 2 different commands for chi-Square test (or chi2-test). The reason is that there is one chi-Square [...]
Statistics – Exact Test on small or skewed data
Hi, sometimes it happens that you have too small or too skewed data to be allowed doing traditional statistical tests. For example chi2-test has some rules that has to be fulfilled (I will show [...]
Statistics – nonparametric pairwise test
Last Monday 13/8 I studied a difference between “stress after” and “stress before”, to see if this difference was normal or skewed distributed. The mean value of the [...]
Statistics – Multiple Linear regression
Hi, here is one long blog post for this week, because of a question I got. The user has tried to find any “step-by-step” instruction how to do multiple linear regression, but [...]
Statistics – chi square test in a crosstable
Hi, if you want to test if the frequency distribution differs between groups in a crosstable you can use the most common statistical test called chi2-test or [...]