condition mean min max ZT0-3 23.838649999999998 23.527549999999998 24.149749999999997 ZT4-7 28.6218 28.6218 28.6218 ZT8-11 15.642800000000001 15.642800000000001 15.642800000000001 ZT12-15 0 0 0 ZT16-19 10.12909 10.12909 10.12909 ZT20-23 19.6936 19.6936 19.6936