Exam 15: Testing for Differences Between Groups and for Relationships Among Variables

Multivariate dependence techniques are variants of the _____.

The t-test for comparing the means of two groups assumes that the data are in nominal scales.

A cross-tabulation is a simple way to describe the relationships between two groups.

In a study comparing 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:

The regression parameter that represents the height of the regression line relative to horizontal is _____.

The _____ is the mean of a variable over all observations.

In using the t-test to compare the means of two groups,the degrees of freedom are calculated as _____.

Researchers who want to compare regression results should use _____.

The t-test assumes that the two population means are equal.

When a researcher needs to compare means for a variable grouped into two categories based on some less-than interval variable,a(n)_____ test is appropriate.

A(n)_____ is a test for hypotheses stating that the mean scores from some interval- or ratio-scaled variable group based on some less-than interval classificatory variable are not the same.

The first basic step in interpreting t-test results is to find the p-value associated with a particular t and the corresponding degrees of freedom.

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.

The formula for determining the degrees of freedom for a chi-square test is ______.

A researcher has data on viewers' responses regarding what company sponsored the Super Bowl half-time show for the past two years and has coded it "1" if the response was correct and "0" if not.He would like to examine if there is a statistical difference in correct answers between the two years.Explain what statistical test is appropriate to address this research question.

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 using _____.

A t-test is not appropriate and should not be used when the sample size is greater than 30.

The statistical test for an ANOVA model is the ______.

The independent samples t-test tests the differences between means taken from two independent samples or groups.

All of the following are software that researchers can use to perform statistical calculations EXCEPT _____.