condition mean min max ZT0-3 0.043709 0.043709 0.043709 ZT4-7 0.0592065 0.0592065 0.0592065 ZT8-11 0.0744137 0.0744137 0.0744137 ZT12-15 0.01885925 0.01885925 0.01885925 ZT16-19 0.0177472 0.0177472 0.0177472 ZT20-23 0.0894376 0.0894376 0.0894376