condition mean min max ZT0-3 185.088134 185.088134 185.088134 ZT4-7 171.87199900000002 171.87199900000002 171.87199900000002 ZT8-11 169.957 169.957 169.957 ZT12-15 171.2672775 171.2672775 171.2672775 ZT16-19 191.67371 191.67371 191.67371 ZT20-23 190.0831495 190.0831495 190.0831495