condition mean min max ZT0-3 15.7235 15.7235 15.7235 ZT4-7 12.640450000000001 12.640450000000001 12.640450000000001 ZT8-11 13.83465 13.83465 13.83465 ZT12-15 13.0809 13.0809 13.0809 ZT16-19 16.70765 16.70765 16.70765 ZT20-23 15.7335 15.7335 15.7335