condition mean min max ZT0-3 0.06477561 0.06477561 0.06477561 ZT4-7 0.01160395 0.01160395 0.01160395 ZT8-11 0.053347 0.053347 0.053347 ZT12-15 0.004740895 0.004740895 0.004740895 ZT16-19 0.01064103633 0.01064103633 0.01064103633 ZT20-23 0.07732599999999999 0.07732599999999999 0.07732599999999999