condition mean min max ZT0-3 87.63277500000001 83.388 91.87755 ZT4-7 59.2748 59.2748 59.2748 ZT8-11 53.9568 53.9568 53.9568 ZT12-15 0 0 0 ZT16-19 67.67580000000001 67.67580000000001 67.67580000000001 ZT20-23 68.23775 68.23775 68.23775