condition mean min max ZT0-3 0.0172511 0.0172511 0.0172511 ZT4-7 0.0476472 0.0476472 0.0476472 ZT8-11 0.01945255 0.01945255 0.01945255 ZT12-15 0.1187885 0.1187885 0.1187885 ZT16-19 0.29251649999999996 0.29251649999999996 0.29251649999999996 ZT20-23 0.0622534 0.0622534 0.0622534