condition mean min max ZT0-3 0.9467139999999999 0.7618389999999999 1.131589 ZT4-7 0.630657 0.630657 0.630657 ZT8-11 0.380039 0.380039 0.380039 ZT12-15 0 0 0 ZT16-19 0.7488095 0.7488095 0.7488095 ZT20-23 0.374712 0.374712 0.374712