Marketing Research Ch. 15
Multiple R ranges from ______and represents the amount of the dependent variable explained or accounted for, by the combined independent variables
A or b
Standardized betas indicate the relative importance of:
Alternative predictive variable
What is the type of analysis for the case in which only two variables are involved in the predictive model?
Bivariant regression analysis
Regression is_______to correlation by the underlying straight-line relationship
Directly related
There are instances in which a marketing Researcher may want to use an independent variable that:
Doesn't embody interval scaling assumptions
What does a researcher do with the mixed significance results he or she may have found in a multiple regression analysis?
Eliminate non-significance variable and re-run the regression
Straight line equation
Is the basis of regression analysis
The presence of correlations among the independent variables in multiple regression is termed
Multi-collinearity
What is the primary term for coefficient of determination and handy measure of the strength of the overall linear relationship?
Multiple R
Is a very powerful tool because it tells us what factors are related to the dependent variable, how each factor influences the dependent variable (the sign) and how much each factor influences it (the size of bi)
Multiple regression
Is an expansion of bivariate regression analysis in that more than one independent variable is used in the regression equation
Multiple regression analysis
When using SPSS to run stepwise multiple regression, there is:
No need to trim and re-run
To compute a (intercept) and b (slope), you must work with a number of ______of the various levels of the dependent variable paired with different levels of the independent variable
Observations
The final output in stepwise multiple regression contains:
Only statistically significant independent variables
The larger the absolute value of a standardized beta coefficient, the more relative importance it assumes in:
Predicting the dependent variable
With multiple regression, you work with a _______rather than a line
Regression plane
High multiple R values indicate what?
Regression plane applies well
Researchers sometimes refer to bivariate regression as :
Simple regression
When a researcher standardizes independent variables through a quick operation that involves dividing the difference between each independent variable value and it's mean by the standard deviation of that independent variable, it results in the:
Standardized beta
A multiple regression result is an estimate of the population multiple regression equation and just as is the case with other estimated population parameters it is necessary to test for what?
Statistical significance
When a researcher has many independent variables and wants to narrow the set down to a smaller number which form of regression is useful?
Stepwise multiple regression
The_______enables the marketing researcher to think in terms of fewer dimensions within which the dependent variable relationship operates
Trimming process
What is a satisfactory method for improving a regression analysis?
Use a scatter diagram
What is a way of guaranteeing that the straight line that runs through the points on the scatter diagram is positioned so as to minimize the vertical distances away from the line of the various points?
Use of least square criteria
The way to avoid multicollinearity is to use warning statistics issued by most statistical analysis programs to identify this problem. One commonly used method is the:
Variance inflation factor
regression analysis
What is the predictive analysis technique in which one or more variables are used to predict the level of another by use of the straight-line formula?
independent variable
What variable is customarily termed x in the regression formula?
dependent variable
What variable is customarily termed y in the regression straight-line equation?