condition mean min max ZT0-3 286.6311111 286.6311111 286.6311111 ZT4-7 281.1105555666667 281.1105555666667 281.1105555666667 ZT8-11 427.095 427.095 427.095 ZT12-15 386.30111109999996 386.30111109999996 386.30111109999996 ZT16-19 283.83 283.83 283.83 ZT20-23 313.8688889 313.8688889 313.8688889