题目
If the F-test shows that the set of X variables explain a significant amount of variation in the Y variable, then:
选项
A.Another linear regression model should be tried.
B.A t-test should be used to test which of the individual X variables, if any, should be discarded.
C.A transformation of the Y variable should be made.
D.Another test could be done using an indicator variable to test the significance level of the model.
答案
B
解析
As dealing with a set of x variables (a multivariate regression analysis), an F statistic would describe the relationship between the set and the dependent variable without identifying specific variables in the set. The t-test can be used to determine the relationship of each variable in the set to the dependent variable.在处理一组x变量（多元回归分析）时，F统计量将描述该组与因变量之间的关系，而无需标识该组中的特定变量。 t检验可用于确定集合中每个变量与因变量的关系。