When coding rating scale values, using a #scales Class, the regular code-based statistics handle each number as a counting value that can be summarized and are therefore usually not that what you need.
For those numeric codes an extra statistics report is available.
This report can ONLY be applied to #scale Classes (putting a # in front of your Class name turns your Class into a scale-class. #scale Classes should only contain numbers).
▪Select Analysis - Evaluation - Statistics 
>Scale Statistics Report to call this report:
Count - Number of values logged for that Class
Sum - Summary of the numeric values for that Class
Average - Average rating for all scale ratings of this class (Sum / Count)
Duration in seconds - Total duration of the Events with a value for this Class
Average Duration per Set - Duration in seconds / Count