问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
请问为什么选C？F检验不是针对两个样本方差是否相等的检验吗？和这道题有什么关系？
NO.PZ2018122801000062问题如下 You estimate a regression mol Yi=α+β1X1i+β2X2i+εi Y_i=\alpha+\beta_1X_{1i}+\beta_2X_{2i}+\varepsilon_iYi=α+β1X1i+β2X2i+εi You wish to test the joint null hypothesis ththe 95% confinlevel. The p-value for the t-statistic for β1 is 0.07, anthe p-value for the t-statistic for β2 is 0.06. The p-value for the F-statistic for the regression is 0.045. Whiof the following statements is correct? You crejethe null hypothesis because eaβ is fferent from 0 the 95% confinlevel. You cannot rejethe null hypothesis because neither β is fferent from 0 the 95% confinlevel. You crejethe null hypothesis because the F-statistic is significant the 95% confinlevel. You cannot rejethe null hypothesis because the F-statistic is not significant at the 95% confinlevel. C is correct. 考点 ： Regression Coefficient ConfinIntervanSignificantest 解析 ： The T-test woulnot sufficient to test the joint hypothesis. In orr to test the joint null hypothesis, examine the F-statistiwhiin this case is statistically significant the 95% confinlevel. Thus, the null crejecte Pvalue. 在不同检验方法中如何应用？概念非常模糊 碎片化。谢谢
NO.PZ2018122801000062 问题如下 For a sample of 400 firms, the relationship between corporate revenue (Yi) anthe average years of experienper employee (Xi) is moleas follows: Y i = β 1 + β 2 X i + ε i ,i=1,2,...,400 You wish to test the joint null hypothesis ththe 95% confinlevel. The p-value for the t-statistic for β1 is 0.07, anthe p-value for the t-statistic for β2 is 0.06. The p-value for the F-statistic for the regression is 0.045. Whiof the following statements is correct? You crejethe null hypothesis because eaβ is fferent from 0 the 95% confinlevel. You cannot rejethe null hypothesis because neither β is fferent from 0 the 95% confinlevel. You crejethe null hypothesis because the F-statistic is significant the 95% confinlevel. You cannot rejethe null hypothesis because the F-statistic is not significant at the 95% confinlevel. C is correct. 考点 ： Regression Coefficient ConfinIntervanSignificantest 解析 ： The T-test woulnot sufficient to test the joint hypothesis. In orr to test the joint null hypothesis, examine the F-statistiwhiin this case is statistically significant the 95% confinlevel. Thus, the null crejecte
NO.PZ2018122801000062 问题如下 For a sample of 400 firms, the relationship between corporate revenue (Yi) anthe average years of experienper employee (Xi) is moleas follows: Y i = β 1 + β 2 X i + ε i ,i=1,2,...,400 You wish to test the joint null hypothesis ththe 95% confinlevel. The p-value for the t-statistic for β1 is 0.07, anthe p-value for the t-statistic for β2 is 0.06. The p-value for the F-statistic for the regression is 0.045. Whiof the following statements is correct? You crejethe null hypothesis because eaβ is fferent from 0 the 95% confinlevel. You cannot rejethe null hypothesis because neither β is fferent from 0 the 95% confinlevel. You crejethe null hypothesis because the F-statistic is significant the 95% confinlevel. You cannot rejethe null hypothesis because the F-statistic is not significant at the 95% confinlevel. C is correct. 考点 ： Regression Coefficient ConfinIntervanSignificantest 解析 ： The T-test woulnot sufficient to test the joint hypothesis. In orr to test the joint null hypothesis, examine the F-statistiwhiin this case is statistically significant the 95% confinlevel. Thus, the null crejecte 老师为什么p-value值越小，越拒绝啊，一直理解不了
NO.PZ2018122801000062
NO.PZ2018122801000062
