Exam 22: Bivariate Statistical Analysis: Differences Between Two Variables

The chi-square test requires the researcher to compare the observed frequencies of the groups with the expected frequencies of the groups.

In using the t-test to compare the difference between the means of two groups, the formula for determining the degrees of freedom is ______.

A researcher hypothesizes that males and females differ with respect to attitude toward sports sponsorships. To investigate this hypothesis that these two groups' attitudes differ, he will use a _____.

A paired-sample t-test is an appropriate test for comparing the scores of two interval variables drawn from related populations.

A test of a hypothesis to determine if two groups differ with respect to the scores on one variable is called a(n) ______.

Practically speaking, what is the first thing a researcher should do when interpreting ANOVA results?

If 25 of the 35 females in a research study agree with a statement, and 15 of the 35 males agree with this statement, the expected value for males-agree is _____.

In practice, what is the first step in interpreting the t-test when comparing two means?

The statistical test for an ANOVA model is the ______.

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

The F-test partitions the total variance into within-group variance and between-group variance.

Total variability is the calculated by dividing the within-group variance by the between-group variance.

The sum of the differences between observed values and the group mean for a given set of observations is known as the _____.

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.

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

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

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

In using the Z-test for comparing two proportions, if the pooled estimate of the proportion of successes is 0.36, then the pooled estimate of proportion of failures is _____.

The formula for the chi-square test uses _____.