condition mean min max ZT0-3 11.293557499999999 10.137765 12.449349999999999 ZT4-7 7.02156 7.02156 7.02156 ZT8-11 3.54085 3.54085 3.54085 ZT12-15 0 0 0 ZT16-19 5.94115 5.94115 5.94115 ZT20-23 7.499155 7.499155 7.499155