Question 3 2 pts A chi-square test for independence is used to evaluate the rela

Question

Question 3 2 pts A chi-square test for independence is used to evaluate the relationship between two variables, If one variable is classified into 4 categories and the other variable is classified into 2 categories, then the chi- square statistic will have a degree of freedom- O cannot determine the value of df from the information provided Question 4 2 pts Which model is more possible to have smaller R2 where Y and X1 in model A and B are the same. Model A Model B Not enough information Question 5 2 pts In multiple regression analysis, the correlation among the independent variables is termed O linearity

Explanation / Answer

(3) The degree of freedom of chi-square =(r-1)*(c-1), Here 4*2 categories then the degree of freedom=(4-1)*(2-1)=3,Hence option(2) is correct.

(4) Model A is more possible to have smaller R^2. (since, Every time, if we add a predictor variable to a model, the R-squared increases). Hence,option(1) is correct.

(5) in multiple regression analysis, the correlation among the independent variable is termed as multicollinearity. Hence option(3) is correct.

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