condition mean min max ZT0-3 0.63759875 0.416171 0.8590265 ZT4-7 3.14611 3.14611 3.14611 ZT8-11 0.8382545 0.8382545 0.8382545 ZT12-15 0 0 0 ZT16-19 0.635885 0.635885 0.635885 ZT20-23 3.0092049999999997 3.0092049999999997 3.0092049999999997