condition mean min max ZT0-3 11.593813333333333 1.909045 29.311349999999997 ZT4-7 0.659235 0.659235 0.659235 ZT8-11 0.0 0.0 0.0 ZT12-15 0.11111725 0.0 0.2222345 ZT16-19 0.0 0.0 0.0 ZT20-23 0.0 0.0 0.0