condition mean min max ZT0-3 10.745012500000001 10.534375 10.95565 ZT4-7 7.975709999999999 7.975709999999999 7.975709999999999 ZT8-11 3.69043 3.69043 3.69043 ZT12-15 0 0 0 ZT16-19 6.3374299999999995 6.3374299999999995 6.3374299999999995 ZT20-23 9.355644999999999 9.355644999999999 9.355644999999999