condition mean min max ZT0-3 152.729466 152.729466 152.729466 ZT4-7 159.0556185 159.0556185 159.0556185 ZT8-11 123.97946 123.97946 123.97946 ZT12-15 112.69738749999999 112.69738749999999 112.69738749999999 ZT16-19 126.99874 126.99874 126.99874 ZT20-23 112.8554885 112.8554885 112.8554885