condition mean min max ZT0-3 60.0488 60.0488 60.0488 ZT4-7 41.0243 41.0243 41.0243 ZT8-11 62.852149999999995 62.852149999999995 62.852149999999995 ZT12-15 88.51689999999999 88.51689999999999 88.51689999999999 ZT16-19 97.44585000000001 97.44585000000001 97.44585000000001 ZT20-23 80.78694999999999 80.78694999999999 80.78694999999999