condition mean min max ZT0-3 9.706227 9.706227 9.706227 ZT4-7 12.194868 12.194868 12.194868 ZT8-11 9.1308005 9.1308005 9.1308005 ZT12-15 9.900072 9.900072 9.900072 ZT16-19 9.3701065 9.3701065 9.3701065 ZT20-23 9.497793999999999 9.497793999999999 9.497793999999999