Dear all,
Just a quick question...
My data consists of replies from respondents for x questions, each
respondent has to give an opinion to each of the questions. There are 5
categories: 1=strongly disagree...5=strongly agree.
a)I have z subjects who each gave opinions both before and after an
event takes place.
b)I also have two independent groups. One group gave opinions before
the event and a different group gave opinions after the event.
Bearing in mind the nature of the data, my question is, to test if the
'event' changed the subjects opinions:
For a) is it appropriate to use the Wilcoxon signed ranks test, and
For b) is it apprpriate to use the Mann Whitney U test.
Many thanks for your advice,
Kim.
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