condition mean min max ZT0-3 0.0126467 0.0126467 0.0126467 ZT4-7 0.015341200000000001 0.015341200000000001 0.015341200000000001 ZT8-11 0.020254 0.020254 0.020254 ZT12-15 0.0 0.0 0.0 ZT16-19 0.01576433333333333 0.01576433333333333 0.01576433333333333 ZT20-23 0.0 0.0 0.0