condition mean min max ZT0-3 57.199999999999996 57.199999999999996 57.199999999999996 ZT4-7 17.0 17.0 17.0 ZT8-11 51.150000000000006 51.150000000000006 51.150000000000006 ZT12-15 227.8 227.8 227.8 ZT16-19 246.20000000000002 246.20000000000002 246.20000000000002 ZT20-23 99.2 99.2 99.2