condition mean min max ZT0-3 79.23682500000001 74.86895 83.60470000000001 ZT4-7 57.021100000000004 57.021100000000004 57.021100000000004 ZT8-11 19.920299999999997 19.920299999999997 19.920299999999997 ZT12-15 0 0 0 ZT16-19 32.09675 32.09675 32.09675 ZT20-23 60.6275 60.6275 60.6275