condition mean min max ZT0-3 0.21359475 0.0 0.4271895 ZT4-7 23.587899999999998 23.587899999999998 23.587899999999998 ZT8-11 63.29560000000001 63.29560000000001 63.29560000000001 ZT12-15 0 0 0 ZT16-19 7.152324999999999 7.152324999999999 7.152324999999999 ZT20-23 4.23565 4.23565 4.23565