condition mean min max ZT0-3 32.92815 32.92815 32.92815 ZT4-7 51.0763 51.0763 51.0763 ZT8-11 38.292 38.292 38.292 ZT12-15 26.1284 26.1284 26.1284 ZT16-19 14.56905 14.56905 14.56905 ZT20-23 28.460099999999997 28.460099999999997 28.460099999999997