condition mean min max ZT0-3 0.00233808225 0.0 0.0046761645 ZT4-7 0.010252283249999999 0.0 0.020504566499999998 ZT8-11 0.22397018925 0.0962193175 0.351721061 ZT12-15 0.7022212619999999 0.644763518 0.7596790059999999 ZT16-19 0.0965751865 0.0849963915 0.1081539815 ZT20-23 0.19321276125 0.1164570615 0.269968461