condition mean min max ZT0-3 0.16596275 0.164588 0.1673375 ZT4-7 1.228757 1.228757 1.228757 ZT8-11 0.723353 0.723353 0.723353 ZT12-15 0 0 0 ZT16-19 0.6587265 0.6587265 0.6587265 ZT20-23 0.3303425 0.3303425 0.3303425