condition mean min max ZT0-3 35.85 35.85 35.85 ZT4-7 79.3 79.3 79.3 ZT8-11 62.45 62.45 62.45 ZT12-15 36.75 36.75 36.75 ZT16-19 29.150000000000002 29.150000000000002 29.150000000000002 ZT20-23 12.45 12.45 12.45