Exam 15: Testing for Differences Between Groups and for Predictive Relationships

The F-test partitions total variance into ____________________ variance and ____________________ variance.

A simple before-and-after test calls for a paired-samples t-test so long as the dependent variable is not continuous.

Which value provides a common metric allowing regression results to be compared to one another, regardless of what the original scale range may have been?

When a researcher is attempting to predict sales volume by using building permits, amount of advertising, and the income levels of residents, the researcher is most likely using ____.

In comparing the difference of the means between two groups, the null hypothesis can also be stated as ____.

____________________ is the appropriate test to use when comparing the means of three or more groups to see if they are significantly different from one another.

Multivariate statistical analysis permits the researcher to consider more than one dependent variable at the same time.

Multivariate dependence techniques are variants of the ____________________.

____________________ may be used to assess problems with multicollinearity.

What is ANOVA and when is it the appropriate statistical technique? What test is used to determine significance?

Which type of analysis involves three or more variables?

If the purpose of the regression analysis is forecasting, then standardized regression estimates are most appropriate.

In most business research, the estimate of $\alpha$ in a regression equation is most important.

A(n)____________________ variable has two distinct levels that are coded as 0 and 1.

In regression analysis, the symbol X is commonly used for the ____ variable, and the symbol Y is commonly used for the ____ variable.

Multivariate dependence techniques are variants of the ____, which is a way of modeling some process based on how different variables cause fluctuations from the average dependent variable.

A variable that has two distinct levels that are coded as either zero or one is called a(n)____.

Describe a Z-test for comparing two proportions along with its appropriate null hypothesis.

In the regression equation, Y = a + $\beta$ X, a is the symbol for the ____.

A study compares the means of two groups in which there are 45 males in Group 1 and 37 females in Group 2.The degrees of freedom for this study when using the t-test for the difference between means is ____.