condition mean min max ZT0-3 0.10777990000000001 0.04226625 0.17329355000000002 ZT4-7 0.0 0.0 0.0 ZT8-11 0.085609 0.085609 0.085609 ZT12-15 0 0 0 ZT16-19 0.17030499999999998 0.17030499999999998 0.17030499999999998 ZT20-23 0.0859405 0.0859405 0.0859405