How to calculate the overall mean of several Likert scale data?
Hi, I have a set of questionnaire as follow:
Perceived Usefulness Rating(5-point Likert Scale)
I used SPSS to compute the mean of these data. The output as follow:
Descriptive Statistic N Minimum Maximum Mean Standard Deviation
The result show that mean is compute for each PU01, PU02, PU03. This is not the result that I desired.
The question is how can I calculate the mean of the PU01, PU02, PU03 under a category which is Perceived Usefulness?
*English is not my native language.