Regression

When will you use hierarchical regression?

• You have less than 10 predictors

• Predictors are based on theory

• You want to consider only significant predictors

• You want to enter all predictors at once

How much additional variability in Y is explained by Model 2 over Model 1?

• .665

• .335

• .578

• .330

When you have categorical predictors, the slope is the

• average difference between all groups

• difference between the group of interest and the reference group

• mean of the reference group

• value of the basic mean model

The percent of total variation of the dependent variable Y explained by the set of independent variables X is measured by

• Coefficient of Correlation

• Coefficient of Skewness

• Coefficient of Determination

• Standard Error of Estimate

How many dependent variables (DV) in a multiple linear regression?

• 1 dependent variable

• 0 dependent variable

• multiple dependent variables

• 1 independent variable

In regression analysis, the variable that is being predicted is the

• Dependent variable

• Independent variable

• Intervening variable

• None of the above

What's the correlation between one dichotomous variable and one interval/ratio variable?

• Pearson product-moment correlation

• Spearman rho correlation

• Phi correlation

• Point biserial correlation

The F test is used to determine whether the overall regression model is significant.

• True

• False

A market analyst is developing a regression model to predict monthly household expenditures on groceries as a function of family size, household income, and household neighbourhood (urban, suburban, and rural). The outcome/dependent variable in this model is ___.

• family size

• expenditures on groceries

• household income

• household neighbourhood

In SPSS output, which table tells if each individual predictor predicts the DV?

• ANOVA summary table

• Regression coefficients table