condition mean min max ZT0-3 49.62058 49.62058 49.62058 ZT4-7 46.823721500000005 46.823721500000005 46.823721500000005 ZT8-11 48.7523015 48.7523015 48.7523015 ZT12-15 58.5085715 58.5085715 58.5085715 ZT16-19 33.421833 33.421833 33.421833 ZT20-23 38.6529315 38.6529315 38.6529315