condition mean min max ZT0-3 19.45 19.45 19.45 ZT4-7 17.7 17.7 17.7 ZT8-11 29.35 29.35 29.35 ZT12-15 24.85 24.85 24.85 ZT16-19 4.7 4.7 4.7 ZT20-23 7.800000000000001 7.800000000000001 7.800000000000001