condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.03425755 0.03425755 0.03425755 ZT8-11 0.03481925 0.03481925 0.03481925 ZT12-15 0.1054635 0.0754775 0.1354495 ZT16-19 0.03363075 0.03363075 0.03363075 ZT20-23 0.03657065 0.03657065 0.03657065