Question 1

Multivariate dependence techniques are variants of the _____.

Accepted Answer

The answer of Multivariate dependence techniques are variants of the...

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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:

Accepted Answer

A)  84 
B)  80 
C)  82 
D)  160

Question 5

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

Accepted Answer

The answer of The regression parameter that represents the height...

Question 6

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

Accepted Answer

The answer of The _____ is the mean of a...

Question 7

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

Accepted Answer

A)  n₁ - n₂ - 2 
B)  n₁ + n₂ - 2 
C)  n₁ x n₂ -2 
D)  n₁ / n₂ - 2

Question 8

Researchers who want to compare regression results should use _____.

Accepted Answer

The answer of Researchers who want to compare regression results...

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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.

Accepted Answer

A) True 
 B)False

Question 11

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.

Accepted Answer

A)  regression 
B)  cluster analysis 
C)  x² test 
D)  independent samples t-test

Question 12

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.

Accepted Answer

A) True 
 B)False

Question 13

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.

Accepted Answer

A)  ordinary linear model (OLM) 
B)  weighted average model (WAM) 
C)  general linear model (GLM) 
D)  metric scaling model (MSM)

Question 14

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

Accepted Answer

The answer of The formula for determining the degrees of...

Question 15

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.

Accepted Answer

The answer of A researcher has data on viewers' responses...

Question 16

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 _____.

Accepted Answer

A)  univariate analysis 
B)  a chi-square analysis 
C)  multiple regression analysis 
D)  factor analysis

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

The statistical test for an ANOVA model is the ______.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

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

Accepted Answer

A)  Excel 
B)  SAS 
C)  ANOVA 
D)  JMP

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 ______.

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 _____.