condition mean min max ZT0-3 87.0634 87.0634 87.0634 ZT4-7 67.583 67.583 67.583 ZT8-11 65.83709999999999 65.83709999999999 65.83709999999999 ZT12-15 52.944199999999995 52.944199999999995 52.944199999999995 ZT16-19 54.2603 54.2603 54.2603 ZT20-23 90.5153 90.5153 90.5153