condition mean min max ZT0-3 298.437079825 227.3180469 369.55611275 ZT4-7 412.95564034999995 385.46237454999994 440.44890615 ZT8-11 324.5472109 274.30055495 374.79386685 ZT12-15 149.30321505 125.2022605 173.4041696 ZT16-19 194.04499675 192.59120609999997 195.49878740000003 ZT20-23 180.783589225 174.5964075 186.97077094999997