condition mean min max ZT0-3 187.2076172 147.5692815 226.8459529 ZT4-7 193.57037425 175.9560752 211.1846733 ZT8-11 153.0676609 150.48477335 155.65054844999997 ZT12-15 134.8432552 120.6237473 149.06276309999998 ZT16-19 95.1425812425 93.60304676000001 96.682115725 ZT20-23 83.6206517425 77.989433005 89.25187048000001