condition mean min max ZT0-3 47.4145 45.389849999999996 49.43915 ZT4-7 41.1561 41.1561 41.1561 ZT8-11 42.984350000000006 42.984350000000006 42.984350000000006 ZT12-15 0 0 0 ZT16-19 64.2423 64.2423 64.2423 ZT20-23 60.0625 60.0625 60.0625