condition mean min max ZT0-3 4.347569999999999 4.347569999999999 4.347569999999999 ZT4-7 3.25804 3.25804 3.25804 ZT8-11 5.9437 5.9437 5.9437 ZT12-15 6.11722 6.11722 6.11722 ZT16-19 9.447555000000001 9.447555000000001 9.447555000000001 ZT20-23 5.8299900000000004 5.8299900000000004 5.8299900000000004