condition mean min max ZT0-3 15.680299999999999 14.686300000000001 16.6743 ZT4-7 7.1141749999999995 7.1141749999999995 7.1141749999999995 ZT8-11 4.0436499999999995 4.0436499999999995 4.0436499999999995 ZT12-15 0 0 0 ZT16-19 11.1103 11.1103 11.1103 ZT20-23 13.353200000000001 13.353200000000001 13.353200000000001