condition mean min max ZT0-3 0.5298395 0.484611 0.5750679999999999 ZT4-7 0.2859105 0.2859105 0.2859105 ZT8-11 0.371242 0.371242 0.371242 ZT12-15 0 0 0 ZT16-19 0.5651705 0.5651705 0.5651705 ZT20-23 0.3661085 0.3661085 0.3661085