condition mean min max ZT0-3 247.5899 247.5899 247.5899 ZT4-7 267.476168 267.476168 267.476168 ZT8-11 287.7705185 287.7705185 287.7705185 ZT12-15 310.286106 310.286106 310.286106 ZT16-19 210.3471315 210.3471315 210.3471315 ZT20-23 224.193595 224.193595 224.193595