condition mean min max ZT0-3 0.33745533333333333 0.0 0.680105 ZT4-7 0.1581355 0.1581355 0.1581355 ZT8-11 0.0 0.0 0.0 ZT12-15 0.3465935 0.160227 0.53296 ZT16-19 0.310484 0.310484 0.310484 ZT20-23 0.6877295000000001 0.6877295000000001 0.6877295000000001