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

An investigation of a hypothesis stating that two (or more)groups differ with respect to measures of another variable is called a(n)____________________.

What are some of the most common statistical software packages?

The sum of differences between the group mean and the grand mean summed over all groups for a given set of observations is called ____________________.

One way to test the significance of the relationship shown in a contingency tables is by means of the chi-square test.

What is the final step in interpreting a multiple regression model?

In the formula df = n - k, k represents the ____.

In regression, the standardized Y-intercept term is always 1.

Discuss when a paired-samples t-test is appropriate and give an example of when it should be used.

If a researcher is interested in whether adult males purchase a product more frequently than adult females, univariate statistics would be used in the analysis of data.

In multiple regression, dummy variables are those that have no effect on the dependent variable.

How many degrees of freedom are there in a four-cell chi-square test?

In a brand awareness study, 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females identify this brand correctly.The chi-square value for this study is approximately ____.

about the mean of a variable over all observations is called the ________________ mean.

Multiple regression analysis includes a single independent variable but several dependent variables.

ANOVA and Linear Regression are among the most common forms of the general linear model (GLM).

The statistical significance of a regression model is determined using the ____.

If the regression equation is: Y = -4.2 + 3.6 X, then the expected score for Y when X is 4 would be ____.

The test for the statistical significance of the regression model is the ____________________ test.

The null hypothesis when using the Z-test for the differences between the proportions of two groups is that ____________________.

In a regression equation, the slope of the line, $\beta$ , is the change in X that is due to a corresponding change of one unit of Y.