condition mean min max ZT0-3 525.762134 525.762134 525.762134 ZT4-7 745.7938095 745.7938095 745.7938095 ZT8-11 669.709884 669.709884 669.709884 ZT12-15 812.6808980000001 812.6808980000001 812.6808980000001 ZT16-19 618.7848555 618.7848555 618.7848555 ZT20-23 467.847132 467.847132 467.847132