condition mean min max ZT0-3 154.918919825 152.18328445 157.6545552 ZT4-7 149.22158460000003 147.91822760000002 150.5249416 ZT8-11 163.78842878333333 159.29801016666667 168.2788474 ZT12-15 170.51348389999998 168.83628793333332 172.19067986666664 ZT16-19 225.6092179 211.0160798 240.202356 ZT20-23 223.12982273333336 219.38041833333332 226.87922713333336