condition mean min max ZT0-3 4.879915046500001 4.632209845 5.127620248 ZT4-7 4.746311126249999 4.3521173404999995 5.140504912 ZT8-11 4.2415863165 4.1732532760000005 4.309919357 ZT12-15 3.510543964 3.2518676575 3.7692202705 ZT16-19 3.27950331625 2.7002747035 3.858731929 ZT20-23 10.49374102 5.5779374165 15.4095446235