condition mean min max ZT0-3 841.3499999999999 841.3499999999999 841.3499999999999 ZT4-7 875.5 875.5 875.5 ZT8-11 984.25 984.25 984.25 ZT12-15 800.95 800.95 800.95 ZT16-19 830.5 830.5 830.5 ZT20-23 789.7 789.7 789.7