condition mean min max ZT0-3 0.07968716666666667 0.0 0.2390615 ZT4-7 0.319243 0.319243 0.319243 ZT8-11 0.6599805 0.6599805 0.6599805 ZT12-15 0.9552452499999999 0.735572 1.1749185 ZT16-19 0.116424 0.116424 0.116424 ZT20-23 0.079744 0.079744 0.079744