condition mean min max ZT0-3 10.214345 10.214345 10.214345 ZT4-7 12.0876 12.0876 12.0876 ZT8-11 12.8825 12.8825 12.8825 ZT12-15 12.0731 12.0731 12.0731 ZT16-19 11.702100000000002 11.702100000000002 11.702100000000002 ZT20-23 10.885615000000001 10.885615000000001 10.885615000000001