condition mean min max ZT0-3 258.259183 258.259183 258.259183 ZT4-7 281.7148755 281.7148755 281.7148755 ZT8-11 36.669925 36.669925 36.669925 ZT12-15 15.008254999999998 15.008254999999998 15.008254999999998 ZT16-19 114.8019685 114.8019685 114.8019685 ZT20-23 424.7079625 424.7079625 424.7079625