condition mean min max ZT0-3 35.249050000000004 28.43335 42.064750000000004 ZT4-7 40.236149999999995 40.236149999999995 40.236149999999995 ZT8-11 24.47055 24.47055 24.47055 ZT12-15 0 0 0 ZT16-19 61.446200000000005 61.446200000000005 61.446200000000005 ZT20-23 77.2328 77.2328 77.2328