condition mean min max ZT0-3 1097.1 1097.1 1097.1 ZT4-7 714.1 714.1 714.1 ZT8-11 747.8499999999999 747.8499999999999 747.8499999999999 ZT12-15 878.4000000000001 878.4000000000001 878.4000000000001 ZT16-19 826.2 826.2 826.2 ZT20-23 818.6 818.6 818.6