condition mean min max ZT0-3 106.6251 106.6251 106.6251 ZT4-7 82.0652 82.0652 82.0652 ZT8-11 83.30335 83.30335 83.30335 ZT12-15 73.89484999999999 73.89484999999999 73.89484999999999 ZT16-19 137.785 137.785 137.785 ZT20-23 111.1035 111.1035 111.1035