The nnt value is a percentage, not the raw point

[drarifozer]

Hi
When Cohen d =0, there is an explanation like that: "Moreover, in order to have one more favourable outcome in the "treatment" group compared to the "control" group, we need to treat 16.5 people on average. " it is seen as NNT= 16.5 on the graph. Then again, we calculate the number of people in the experimental group, ex. 20+6.1. This is confusing, at least mine :).
Is 16.5 a raw number or a percentage, because the numbers you use in the whole process are percentages, not raw points.
Thank you

ARR=(Control event rate)− (Experimental event rate)
ARR=0.2−0.3651=−0.1651
NNT=1/ARR
NNT=1/−0.1651=−6.1