condition mean min max ZT0-3 33.53530000000001 33.53530000000001 33.53530000000001 ZT4-7 16.831049999999998 16.831049999999998 16.831049999999998 ZT8-11 14.1826 14.1826 14.1826 ZT12-15 16.95865 16.95865 16.95865 ZT16-19 29.7479 29.7479 29.7479 ZT20-23 29.3569 29.3569 29.3569