condition mean min max ZT0-3 0.1376156 0.1376156 0.1376156 ZT4-7 0.07449054999999999 0.07449054999999999 0.07449054999999999 ZT8-11 0.07213850000000001 0.07213850000000001 0.07213850000000001 ZT12-15 0.25268599999999997 0.25268599999999997 0.25268599999999997 ZT16-19 0.6039655 0.6039655 0.6039655 ZT20-23 0.382375 0.382375 0.382375