condition mean min max ZT0-3 35.780319 35.780319 35.780319 ZT4-7 29.527590500000002 29.527590500000002 29.527590500000002 ZT8-11 32.557153 32.557153 32.557153 ZT12-15 32.975069 32.975069 32.975069 ZT16-19 53.8739025 53.8739025 53.8739025 ZT20-23 47.631344999999996 47.631344999999996 47.631344999999996