condition mean min max ZT0-3 120.499197 120.499197 120.499197 ZT4-7 30.720149 30.720149 30.720149 ZT8-11 12.364351 12.364351 12.364351 ZT12-15 15.7946845 15.7946845 15.7946845 ZT16-19 9.830475 9.830475 9.830475 ZT20-23 9.845636500000001 9.845636500000001 9.845636500000001