condition mean min max ZT0-3 43.40222222 43.40222222 43.40222222 ZT4-7 53.077777780000005 53.077777780000005 53.077777780000005 ZT8-11 63.17888889 63.17888889 63.17888889 ZT12-15 58.800000000000004 58.800000000000004 58.800000000000004 ZT16-19 44.54222222333333 44.54222222333333 44.54222222333333 ZT20-23 39.02444444666667 39.02444444666667 39.02444444666667