condition mean min max ZT0-3 103.7668209925 41.5050688 166.028573185 ZT4-7 356.35305309999995 328.21124009999994 384.49486609999997 ZT8-11 268.63010365 235.89233435 301.36787295 ZT12-15 99.784918065 73.899468935 125.67036719500001 ZT16-19 66.79476012 66.31896804 67.2705522 ZT20-23 52.9592169875 47.332772845 58.585661130000005