condition mean min max ZT0-3 41.820052849999996 33.818912499999996 49.8211932 ZT4-7 16.9569925175 16.36131943 17.552665605 ZT8-11 17.095469895 14.737182325 19.453757465 ZT12-15 15.270924726 14.28398563 16.257863822 ZT16-19 16.2655998725 14.71502068 17.816179065 ZT20-23 20.5939092325 20.31724902 20.870569445