condition mean min max ZT0-3 94.45 94.45 94.45 ZT4-7 161.4 161.4 161.4 ZT8-11 171.10000000000002 171.10000000000002 171.10000000000002 ZT12-15 131.85 131.85 131.85 ZT16-19 113.35 113.35 113.35 ZT20-23 67.85 67.85 67.85