Question 1

Which one of the following procedures is recommended when the distribution is mesokurtic?

Accepted Answer

A)  Brown-Forsythe 
B)  O'Brien 
A)  Brown-Forsythe 
B)  O'Brien

Question 2

A researcher conducted the Brown-Forsythe procedure and reports an alpha level of .01 and p value of .10. Which of the following is a correct statement based on this information?

Accepted Answer

A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination. 
A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination.

Question 3

A researcher wants to determine if the sample variance for reading test scores of a sample of elementary aged children is different than 75. Which one of the following procedures is appropriate to test this?

Accepted Answer

A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above 
A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above

Question 4

A researcher computes the O'Brien procedure and finds an F test statistic of 2.22 and an F critical value of 2.01. Which of the following can be determined?

Accepted Answer

A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination. 
A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination.

Question 5

A researcher wants to determine if the sample variance for college tuition of a sample of college freshmen is different than $10,000. Which one of the following procedures is appropriate to test this?

Accepted Answer

A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above 
A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above

Question 6

Which one of the following procedures is recommended when the distribution is leptokurtic?

Accepted Answer

A)  Brown-Forsythe 
B)  O'Brien 
A)  Brown-Forsythe 
B)  O'Brien

Question 7

A researcher conducted the O'Brien procedure and reports an alpha level of .10 and p value of .05. Which of the following is a correct statement based on this information?

Accepted Answer

A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination. 
A)  The variances of the groups are statistically different. 
B)  The variances of the groups are NOT statistically different. 
C)  There is not enough information to make a determination.

Question 8

A researcher wants to determine if the sample variance for the number of hours spent studying per week for a sample of college students is different than 15. Which one of the following procedures is appropriate to test this?

Accepted Answer

A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above 
A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above

Question 9

The following summary statistics are available for two dependent random samples:
s12 = 36, s22 = 16, n = 22, r12 = .70.
Test the following hypotheses at the .05 level of significance:
 $\begin{array}{l}
H_{0}: \sigma_{1}^{2}-\sigma_{2}^{2}=0 \
H_{1}: \sigma_{1}^{2}-\sigma_{2}^{2} \neq 0
\end{array}$

Accepted Answer

The degrees of freedom (v) are

Question 10

A researcher samples parents of charter school transfer students and wants to determine if the variance of their child's satisfaction with school prior to transferring to the charter school is lower than the variance of their child's satisfaction with school after transferring to the charter school. Which one of the following procedures is appropriate to test this?

Accepted Answer

A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above 
A)  Test for two dependent variances 
B)  Test for two independent variances 
C)  Test for a single variance 
D)  None of the above

Which one of the following procedures is recommended when the distribution is mesokurtic?

A researcher conducted the Brown-Forsythe procedure and reports an alpha level of .01 and p value of .10. Which of the following is a correct statement based on this information?

A researcher wants to determine if the sample variance for reading test scores of a sample of elementary aged children is different than 75. Which one of the following procedures is appropriate to test this?

A researcher computes the O'Brien procedure and finds an F test statistic of 2.22 and an F critical value of 2.01. Which of the following can be determined?

A researcher wants to determine if the sample variance for college tuition of a sample of college freshmen is different than $10,000. Which one of the following procedures is appropriate to test this?

Which one of the following procedures is recommended when the distribution is leptokurtic?

A researcher conducted the O'Brien procedure and reports an alpha level of .10 and p value of .05. Which of the following is a correct statement based on this information?

A researcher wants to determine if the sample variance for the number of hours spent studying per week for a sample of college students is different than 15. Which one of the following procedures is appropriate to test this?

The following summary statistics are available for two dependent random samples: s₁² = 36, s₂² = 16, n = 22, r₁₂ = .70. Test the following hypotheses at the .05 level of significance: :-=0 :-0

Introduction

Data Representation

Univariate Population Parameters and Sample Statistics

Normal Distribution and Standard Scores

Introduction to Probability and Sample Statistics

Inferences About a Single Mean

Inferences About the Difference Between Two Means

Inferences About Proportions

Bivariate Measures of Association

One-Factor Anova: Fixed-Effects Model

Multiple Comparison Procedures

Factorial Anova: Fixed-Effects Model

One-Factor Fixed-Effects Ancova With Single Covariate

Random- and Mixed-Effects Analysis of Variance Models

Hierarchical and Randomized Block Analysis of Variance Models

Simple Linear Regression

Multiple Regression

Logistic Regression

Filters

Exam 9: Inferences About Variances

Which one of the following procedures is recommended when the distribution is mesokurtic?

A researcher conducted the Brown-Forsythe procedure and reports an alpha level of .01 and p value of .10. Which of the following is a correct statement based on this information?

A researcher wants to determine if the sample variance for reading test scores of a sample of elementary aged children is different than 75. Which one of the following procedures is appropriate to test this?

A researcher computes the O'Brien procedure and finds an F test statistic of 2.22 and an F critical value of 2.01. Which of the following can be determined?

A researcher wants to determine if the sample variance for college tuition of a sample of college freshmen is different than $10,000. Which one of the following procedures is appropriate to test this?

Which one of the following procedures is recommended when the distribution is leptokurtic?

A researcher conducted the O'Brien procedure and reports an alpha level of .10 and p value of .05. Which of the following is a correct statement based on this information?

A researcher wants to determine if the sample variance for the number of hours spent studying per week for a sample of college students is different than 15. Which one of the following procedures is appropriate to test this?

The following summary statistics are available for two dependent random samples: s12 = 36, s22 = 16, n = 22, r12 = .70. Test the following hypotheses at the .05 level of significance: :-=0 :-0

Introduction

Data Representation

Univariate Population Parameters and Sample Statistics

Normal Distribution and Standard Scores

Introduction to Probability and Sample Statistics

Inferences About a Single Mean

Inferences About the Difference Between Two Means

Inferences About Proportions

Bivariate Measures of Association

One-Factor Anova: Fixed-Effects Model

Multiple Comparison Procedures

Factorial Anova: Fixed-Effects Model

One-Factor Fixed-Effects Ancova With Single Covariate

Random- and Mixed-Effects Analysis of Variance Models

Hierarchical and Randomized Block Analysis of Variance Models

Simple Linear Regression

Multiple Regression

Logistic Regression

Filters

The following summary statistics are available for two dependent random samples: s₁² = 36, s₂² = 16, n = 22, r₁₂ = .70. Test the following hypotheses at the .05 level of significance: :-=0 :-0