condition mean min max ZT0-3 66.8 66.8 66.8 ZT4-7 63.6 63.6 63.6 ZT8-11 106.85 106.85 106.85 ZT12-15 94.85 94.85 94.85 ZT16-19 89.55000000000001 89.55000000000001 89.55000000000001 ZT20-23 100.19999999999999 100.19999999999999 100.19999999999999