condition mean min max ZT0-3 0.8428616666666667 0.6876375 1.1196865 ZT4-7 0.1610255 0.1610255 0.1610255 ZT8-11 0.358029 0.358029 0.358029 ZT12-15 0.47991725 0.1771355 0.782699 ZT16-19 0.6236155 0.6236155 0.6236155 ZT20-23 0.9792970000000001 0.9792970000000001 0.9792970000000001