Just a quick question on statistics. If i were looking to group 100 participants based on an independent variable (dark triad questionnaire score) of high and low. What would be the best way to decide on how to group them by?

 Would i be best using the average of the actual scores to group them (4642/100=46.42)? 

I am unsure whether to use the method above, due to it giving me an exact split of 50 50.

Or do i to group them based on the average of possible scores (MidRange) ( difference between Highest possible score (105) and lowest possible score(-3)/2 = 108 / 2=54)

Kind Regards,

Aamir

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