Regression analysis can be used to establish cause-and-effect relationships between variables. O True O False

In linear regression models, the value of the coefficient of determination indicates the strength and direction of any linear relationship between the variable and the independent/explanatory dependent/response variable. ● True False

In regression analysis, the variable that is being predicted is the independent variable control variable dependent variable predictor variable

To properly examine the effect of a categorical independent variable in a multiple linear regression model we use an interaction term. True O False

Which of the following statements best describes correlation analysis in a simple linear regression? a. Correlation analysis measures the strength of a relationship between two categorical variables. b. Correlation analysis measures the direction of a relationship between two numerical variables. Correlation analysis measyres the strength and direction of a linear relationship between two numerical variables. d. Correlation analysis measures the strength of a relationship between two numerical variables.

If the correlation coefficient is zero, the slope of a linear regression line will be a. positive b. negative c. positive or negative

you take a bar of soap and weigh it after each shower.  will the regression line be positive or negative