I was wondering how I can use individual standard deviations to get to the standard deviations (of average utilities) mentioned in the summary file.
My issue is that, if I take a look at the summary report, I can see that standard deviatios are decreasing for all attributes from one conjoint analysis to another conjoint analysis (where I added 2 attributes).
But if I take a look at the individual standard deviations, I can see that they are (on average or when I sum them up) increasing from conjoint 1 to conjoint 2.
For me that is very contradicting.
I'm very grateful, if you could help me with that.