condition mean min max ZT0-3 98.55000000000001 98.55000000000001 98.55000000000001 ZT4-7 67.3 67.3 67.3 ZT8-11 52.5 52.5 52.5 ZT12-15 80.25 80.25 80.25 ZT16-19 90.35 90.35 90.35 ZT20-23 74.25 74.25 74.25