condition mean min max ZT0-3 0.5130355 0.5130355 0.5130355 ZT4-7 0.2387065 0.2387065 0.2387065 ZT8-11 0.3288185 0.3288185 0.3288185 ZT12-15 1.48461 1.48461 1.48461 ZT16-19 9.545639999999999 9.545639999999999 9.545639999999999 ZT20-23 1.2168649999999999 1.2168649999999999 1.2168649999999999