condition mean min max ZT0-3 0.310763 0.149567 0.39233 ZT4-7 0.22487649999999998 0.22487649999999998 0.22487649999999998 ZT8-11 0.38517999999999997 0.38517999999999997 0.38517999999999997 ZT12-15 0.39568975 0.3101405 0.48123900000000003 ZT16-19 0.5158125 0.5158125 0.5158125 ZT20-23 0.32987449999999996 0.32987449999999996 0.32987449999999996