condition mean min max ZT0-3 0.06162533333333334 0.0 0.184876 ZT4-7 0.0 0.0 0.0 ZT8-11 1.59216 1.59216 1.59216 ZT12-15 2.35765 1.814295 2.901005 ZT16-19 0.8440215 0.8440215 0.8440215 ZT20-23 0.186276 0.186276 0.186276