condition mean min max ZT0-3 0.5037820000000001 0.5037820000000001 0.5037820000000001 ZT4-7 0.83715 0.83715 0.83715 ZT8-11 0.998013 0.998013 0.998013 ZT12-15 0.3313465 0.3313465 0.3313465 ZT16-19 0.434419 0.434419 0.434419 ZT20-23 0.86824 0.86824 0.86824