condition mean min max ZT0-3 0.6017349912500001 0.20583251600000002 0.9976374665000001 ZT4-7 8.919737716 6.348659292000001 11.49081614 ZT8-11 9.768856372750001 9.235960253 10.3017524925 ZT12-15 10.285385291499999 9.331613087 11.239157495999999 ZT16-19 6.70299864525 5.7076924225 7.698304868 ZT20-23 12.127495055 10.089217335 14.165772775