condition mean min max ZT0-3 167.600758 167.600758 167.600758 ZT4-7 384.733522 384.733522 384.733522 ZT8-11 406.2731425 406.2731425 406.2731425 ZT12-15 386.6491165 386.6491165 386.6491165 ZT16-19 244.6434845 244.6434845 244.6434845 ZT20-23 226.6593435 226.6593435 226.6593435