condition mean min max ZT0-3 36.45 36.45 36.45 ZT4-7 9.9 9.9 9.9 ZT8-11 50.55 50.55 50.55 ZT12-15 13.05 13.05 13.05 ZT16-19 15.850000000000001 15.850000000000001 15.850000000000001 ZT20-23 32.0 32.0 32.0