condition mean min max ZT0-3 616.9000000000001 616.9000000000001 616.9000000000001 ZT4-7 658.9 658.9 658.9 ZT8-11 733.8499999999999 733.8499999999999 733.8499999999999 ZT12-15 956.1 956.1 956.1 ZT16-19 1045.85 1045.85 1045.85 ZT20-23 832.8499999999999 832.8499999999999 832.8499999999999