condition mean min max ZT0-3 1403.75 1403.75 1403.75 ZT4-7 789.3 789.3 789.3 ZT8-11 808.6500000000001 808.6500000000001 808.6500000000001 ZT12-15 1177.6999999999998 1177.6999999999998 1177.6999999999998 ZT16-19 1781.8999999999999 1781.8999999999999 1781.8999999999999 ZT20-23 1661.4 1661.4 1661.4