condition mean min max ZT0-3 0.793715 0.7053039999999999 0.882126 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0544785 0.0544785 0.0544785 ZT12-15 0 0 0 ZT16-19 0.3247005 0.3247005 0.3247005 ZT20-23 0.16361150000000002 0.16361150000000002 0.16361150000000002