condition mean min max ZT0-3 38.9548 37.0945 40.8151 ZT4-7 25.234949999999998 25.234949999999998 25.234949999999998 ZT8-11 10.489180000000001 10.489180000000001 10.489180000000001 ZT12-15 0 0 0 ZT16-19 15.923449999999999 15.923449999999999 15.923449999999999 ZT20-23 22.57795 22.57795 22.57795