condition mean min max ZT0-3 0.28176875 0.26560950000000005 0.29792799999999997 ZT4-7 1.404225 1.404225 1.404225 ZT8-11 0.33864245 0.33864245 0.33864245 ZT12-15 0 0 0 ZT16-19 0.616181 0.616181 0.616181 ZT20-23 0.301056 0.301056 0.301056