condition mean min max ZT0-3 53.249983 53.249983 53.249983 ZT4-7 48.598048500000004 48.598048500000004 48.598048500000004 ZT8-11 49.178559 49.178559 49.178559 ZT12-15 63.95418049999999 63.95418049999999 63.95418049999999 ZT16-19 87.511256 87.511256 87.511256 ZT20-23 62.007282000000004 62.007282000000004 62.007282000000004