Question 9 4 pts Which statement is correct? O Causal relationship between variables can be established using a cross-tab analysis. O Causal relationship between variables can be established using a test market. O Causal relationship between variables can be established using regression analysis. O Causal relationship between variables can be established using analysis of variance (ANOVA). O Causal relationship between variables can be established using any of the analyses mentioned in this question as long as internal validity is carefully maintained