condition mean min max ZT0-3 268.3 268.3 268.3 ZT4-7 164.9 164.9 164.9 ZT8-11 177.5 177.5 177.5 ZT12-15 188.7 188.7 188.7 ZT16-19 222.95 222.95 222.95 ZT20-23 216.14999999999998 216.14999999999998 216.14999999999998