condition mean min max ZT0-3 89.7 89.7 89.7 ZT4-7 75.4 75.4 75.4 ZT8-11 43.8 43.8 43.8 ZT12-15 106.35 106.35 106.35 ZT16-19 158.89999999999998 158.89999999999998 158.89999999999998 ZT20-23 127.25 127.25 127.25