condition mean min max ZT0-3 0.0210325 0.0 0.03157675 ZT4-7 0.062925 0.062925 0.062925 ZT8-11 0.03255255 0.03255255 0.03255255 ZT12-15 0.033819224999999994 0.0 0.06763844999999999 ZT16-19 0.0314414 0.0314414 0.0314414 ZT20-23 0.03545355 0.03545355 0.03545355