condition mean min max ZT0-3 1.4818695 1.4818695 1.4818695 ZT4-7 0.0 0.0 0.0 ZT8-11 0.307316 0.307316 0.307316 ZT12-15 2.4698599999999997 2.4698599999999997 2.4698599999999997 ZT16-19 2.36462 2.36462 2.36462 ZT20-23 1.9618 1.9618 1.9618