condition mean min max ZT0-3 59.221375 56.420950000000005 62.0218 ZT4-7 38.3328 38.3328 38.3328 ZT8-11 14.55695 14.55695 14.55695 ZT12-15 0 0 0 ZT16-19 34.43245 34.43245 34.43245 ZT20-23 45.122550000000004 45.122550000000004 45.122550000000004