condition mean min max ZT0-3 0.03159485 0.0210821 0.0421076 ZT4-7 0.042266899999999996 0.042266899999999996 0.042266899999999996 ZT8-11 0.0429206 0.0429206 0.0429206 ZT12-15 0 0 0 ZT16-19 0.04141065 0.04141065 0.04141065 ZT20-23 0.02093825 0.02093825 0.02093825