condition mean min max ZT0-3 0.1762665 0.1762665 0.1762665 ZT4-7 0.3260925 0.3260925 0.3260925 ZT8-11 0.4833885 0.4833885 0.4833885 ZT12-15 0.3226075 0.3226075 0.3226075 ZT16-19 0.284446 0.284446 0.284446 ZT20-23 0.3150715 0.3150715 0.3150715