NO.PZ2019040801000043
问题如下：
For a regression, the explained sum of square is 954 with 8 degrees of freedom, SSR is 782 with 23 degrees of freedom
The R2 and the F-statistic, respectively, are closest to :
选项：
R2
F-statistic
55%
1.2
82%
1.2
55%
3.5
82%
3.5
解释：
C is correct
考点：R方和F统计量计算
解析：R方等于 ESS/TSS= 954/（954+782）= 54.95%
F等于 （ESS/df）/（SSR/df）=（954/8）/（782/23）= 3.5
讲义210 页F = ESS/k /Rss/n-k-1 是这个公式咩
