condition mean min max ZT0-3 10.007439366749999 4.507671379 15.5072073545 ZT4-7 32.8032539425 30.74997451 34.856533375 ZT8-11 18.369748875 15.703303850000001 21.0361939 ZT12-15 20.310582599999996 13.78476495 26.836400249999997 ZT16-19 56.571795635 51.26055511 61.88303616 ZT20-23 89.60421646 74.477446465 104.730986455