condition mean min max ZT0-3 0.07329308333333334 0.0708575 0.07572866666666667 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0 0.0 0.0 ZT12-15 0.018522875 0.0 0.03704575 ZT16-19 0.0 0.0 0.0 ZT20-23 0 0 0