condition mean min max ZT0-3 238.65 238.65 238.65 ZT4-7 144.7 144.7 144.7 ZT8-11 134.7 134.7 134.7 ZT12-15 148.39999999999998 148.39999999999998 148.39999999999998 ZT16-19 216.14999999999998 216.14999999999998 216.14999999999998 ZT20-23 271.05 271.05 271.05