condition mean min max ZT0-3 41.101049 41.101049 41.101049 ZT4-7 36.3987965 36.3987965 36.3987965 ZT8-11 39.421544499999996 39.421544499999996 39.421544499999996 ZT12-15 37.678526 37.678526 37.678526 ZT16-19 48.4285945 48.4285945 48.4285945 ZT20-23 41.330519 41.330519 41.330519