condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.023064282333333335 0.0 0.04612856466666667 ZT8-11 0.011012642000000001 0.0 0.022025284000000003 ZT12-15 0.0 0.0 0.0 ZT16-19 0.03193743916666667 0.0 0.06387487833333334 ZT20-23 0.0 0.0 0.0