condition mean min max ZT0-3 111.89999999999999 111.89999999999999 111.89999999999999 ZT4-7 147.8 147.8 147.8 ZT8-11 196.35000000000002 196.35000000000002 196.35000000000002 ZT12-15 128.45000000000002 128.45000000000002 128.45000000000002 ZT16-19 171.14999999999998 171.14999999999998 171.14999999999998 ZT20-23 260.95 260.95 260.95