Hi,

I am required to perform some statistical analysis on some data. I am measuring user opinion (given by a 4-point Likert Scale) on two different systems.

I have assigned numbers to the scale, such that 1=strong disagree, 4=strongly agree.

Is it satisfactory to simply compare the two tables - ie the modal value of system 1 is x, the modal value of system 2 is y - therefore one is better than the other?

Or, does some kind of statistical test need to be performed in order to even out errors associated with the average?

Sorry if I haven't explained this well enough, I'll be happy to clarify if necessary.