Question 1

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

Accepted Answer

A)  number of observations 
B)  degrees of freedom of the denominator 
C)  number of independent variables 
D)  sample size

Question 2

The formula given below represents the method for calculating the ____.

Accepted Answer

A)  Z-test 
B)  F-test 
C)  $\chi$2 test 
D)  $\alpha$

Question 3

The degrees of freedom are calculated as df = n - 1 when using the t-test for comparing two means, where n = n1 + n2.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

The answer of The sum of differences between the group...

Question 5

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

Accepted Answer

The answer of The null hypothesis when using the Z-test...

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

In regression analysis, the equation of a straight line is Y = a + $\beta$X.

Accepted Answer

A) True 
 B)False

Question 8

Discuss the pros and cons of raw regression estimates and standardized regression estimates and discuss when each is appropriate.

Accepted Answer

The answer of Discuss the pros and cons of raw...

Question 9

Statistical methods that permit the study of three or more variables at the same time are called ____________________ statistical analysis.

Accepted Answer

The answer of Statistical methods that permit the study of...

Question 10

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

Accepted Answer

A)  $\mu$1 - $\mu$2 = 0 
B)  $\mu$1 + $\mu$2 = 0 
C)  $\mu$1 x $\mu$2 = 0 
D)  $\mu$1 / $\mu$2 = 0

Question 11

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

Accepted Answer

The answer of Describe a Z-test for comparing two proportions...

Question 12

The independent samples t-test tests the differences between means from no more than four independent samples or groups.

Accepted Answer

A) True 
 B)False

Question 13

An appropriate test for comparing the scores of two interval variables drawn from related populations is the ____________________.

Accepted Answer

The answer of An appropriate test for comparing the scores...

Question 14

When the difference between two groups is measured, bivariate statistics are used.

Accepted Answer

A) True 
 B)False

Question 15

In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____.

Accepted Answer

A)   $\pi$1 =  $\pi$2. 
B)   $\pi$1 $\neq$ $\pi$2. 
C)   $\pi$1 x  $\pi$2 = 1 
D)   $\pi$1 -  $\pi$2 = 1

Question 16

When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the ____ variable and the number of customer complaints is the ____ variable.

Accepted Answer

A)  independent; dependent 
B)  dependent; dependent 
C)  dependent; independent 
D)  independent; predictor

Question 17

____________________ may be used to assess problems with multicollinearity.

Accepted Answer

The answer of ____________________ may be used to assess problems...

Question 18

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A)  regression variable 
B)  dummy variable 
C)  MANOVA variable 
D)  ANOVA variable

Question 20

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, the researcher will use a ____.

Accepted Answer

A)  bivariate test of differences 
B)  univariate test of differences 
C)  multivariate test of differences 
D)  cluster analysis

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

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

The formula given below represents the method for calculating the . $The formula given below represents the method for calculating the . A) Z-test B) F-test C) \chi 2 test D) \alpha$

The degrees of freedom are calculated as df = n - 1 when using the t-test for comparing two means, where n = n1 + n2.

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

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

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

In regression analysis, the equation of a straight line is Y = a + $\beta$ X.

Discuss the pros and cons of raw regression estimates and standardized regression estimates and discuss when each is appropriate.

Statistical methods that permit the study of three or more variables at the same time are called ____________________ statistical analysis.

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

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

The independent samples t-test tests the differences between means from no more than four independent samples or groups.

An appropriate test for comparing the scores of two interval variables drawn from related populations is the ____________________.

When the difference between two groups is measured, bivariate statistics are used.

In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____.

When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the variable and the number of customer complaints is the variable.

____________________ may be used to assess problems with multicollinearity.

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

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

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, the researcher will use a ____.

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

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

The formula given below represents the method for calculating the ____.

The degrees of freedom are calculated as df = n - 1 when using the t-test for comparing two means, where n = n1 + n2.

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

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

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

In regression analysis, the equation of a straight line is Y = a + β\betaβ X.

Discuss the pros and cons of raw regression estimates and standardized regression estimates and discuss when each is appropriate.

Statistical methods that permit the study of three or more variables at the same time are called ____________________ statistical analysis.

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

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

The independent samples t-test tests the differences between means from no more than four independent samples or groups.

An appropriate test for comparing the scores of two interval variables drawn from related populations is the ____________________.

When the difference between two groups is measured, bivariate statistics are used.

In using the Z-test for comparing two proportions, the null hypothesis is typically stated as ____.

When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the ____ variable and the number of customer complaints is the ____ variable.

____________________ may be used to assess problems with multicollinearity.

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

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

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, the researcher will use a ____.

The formula given below represents the method for calculating the . $The formula given below represents the method for calculating the . A) Z-test B) F-test C) \chi 2 test D) \alpha$

In regression analysis, the equation of a straight line is Y = a + $\beta$ X.

When the on-time performance of airlines is used to predict the number of customer complaints in a regression equation, on-time performance is the variable and the number of customer complaints is the variable.