condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0047658250000000004 0.0047658250000000004 0.0047658250000000004 ZT8-11 0.020827 0.020827 0.020827 ZT12-15 0.01829446666666667 0.01829446666666667 0.01829446666666667 ZT16-19 0.012100525 0.012100525 0.012100525 ZT20-23 0.0073996 0.0073996 0.0073996