Range (%) I would expect approx. 68% of HR scores to fall betwee.i I would e..pect 95% or HR scores to fall between Fom To ...ea. -*SD, mean +,1*SD; *tea - (2*SD, m+an+,2*SD would e..pect 99% of HR scores to fall between -an- (3*SD mean+(*SD To R.nge (%) I would expect 66% of RR scores to fali be.ween would expect 95% of RR scores to fall be.ween iom. mean-(1*SD) mean + (1*SD) mean-(2 SD) mean + (2*SD)