condition mean min max ZT0-3 1201.75 1201.75 1201.75 ZT4-7 938.6 938.6 938.6 ZT8-11 1012.9000000000001 1012.9000000000001 1012.9000000000001 ZT12-15 1036.9 1036.9 1036.9 ZT16-19 1064.4499999999998 1064.4499999999998 1064.4499999999998 ZT20-23 1140.75 1140.75 1140.75