condition mean min max ZT0-3 4.801002500000001 4.75546 4.846545000000001 ZT4-7 4.70304 4.70304 4.70304 ZT8-11 5.155315 5.155315 5.155315 ZT12-15 0 0 0 ZT16-19 6.283775 6.283775 6.283775 ZT20-23 6.78079 6.78079 6.78079