Question 1

Which assumption can be examined by Q-Q plots?

Accepted Answer

A)  Independence 
B)  Homogeneity of variance 
C)  Normality 
D)  All of the above 
A)  Independence 
B)  Homogeneity of variance 
C)  Normality 
D)  All of the above

Question 2

In ANOVA, which of the following statements occurs when H0 is true?

Accepted Answer

A)  E(MSbetw) = E(MSwith) 
B)  E(MSbetw) > E(MSwith) 
C)  E(F) > 1 
D)  none of the above. 
A)  E(MSbetw) = E(MSwith) 
B)  E(MSbetw) > E(MSwith) 
C)  E(F) > 1 
D)  none of the above.

Question 3

A consumer testing lab wants to compare the mean life of AA batteries produced by different manufacturers. Five brands of batteries are selected, and for each brand, 20 batteries are randomly sampled. The lab then tests for the life time of each battery (in hours), and compares the average battery life of different brands using ANOVA. Complete the following one-factor ANOVA summary table using $\alpha$= .05. Based on the results, do batteries of different brands have different life times?
 $\begin{array}{llllll}
\hline \text { Source } & S S & d f & M S & F & \text { Critical Value and Decision } \
\hline \begin{array}{l}
\text { Between } \
\text { Within }
\end{array} & & & 10 & & \
\text { Total } & 1110 & & & & \
\hline
\end{array}$

Accepted Answer

There are 5 brands, so J=5. Each brand h

Question 4

In a one-factor ANOVA, if H0 is rejected, we conclude that

Accepted Answer

A)  all population means are different from one other. 
B)  at least one pair of population means are different. 
C)  all population means are equal. 
D)  at least one pair of population means are the same. 
A)  all population means are different from one other. 
B)  at least one pair of population means are different. 
C)  all population means are equal. 
D)  at least one pair of population means are the same.

Question 5

Suppose n1 = 15, n2 = 13, n3 = 17, n4 =17. For a one-factor ANOVA, the dftotal would be

Accepted Answer

A)  3 
B)  4 
C)  58 
D)  61 
A)  3 
B)  4 
C)  58 
D)  61

Question 6

The homoscedasticity assumption states that

Accepted Answer

A)  the populations are normally distributed. 
B)  the samples are normally distributed. 
C)  the variances of each population are equal. 
D)  the variances of each sample are equal. 
A)  the populations are normally distributed. 
B)  the samples are normally distributed. 
C)  the variances of each population are equal. 
D)  the variances of each sample are equal.

Question 7

Suppose n1 = 15, n2 = 13, n3 = 17, n4 =17. For a one-factor ANOVA, the dfbetw would be

Accepted Answer

A)  3 
B)  4 
C)  58 
D)  61 
A)  3 
B)  4 
C)  58 
D)  61

Question 8

If you find an F ratio of 2 in a one-factor ANOVA ($\alpha$= .05), you will

Accepted Answer

A)  reject the null hypothesis. 
B)  fail to reject the null hypothesis. 
C)  not be able to decide because the df and critical value are unknown. 
D)  conclude that a mistake has been made. 
A)  reject the null hypothesis. 
B)  fail to reject the null hypothesis. 
C)  not be able to decide because the df and critical value are unknown. 
D)  conclude that a mistake has been made.

Question 9

Suppose that for a one-factor ANOVA with J = 3 and n = 10, two of the sample means are both equal to 4.5, but the other sample mean is 4.8. What conclusion will you make?

Accepted Answer

A)  Reject the null hypothesis. 
B)  Fail to reject the null hypothesis. 
C)  Uncertain because the df and critical value are unknown. 
D)  Uncertain because the variances of the samples are unknown. 
A)  Reject the null hypothesis. 
B)  Fail to reject the null hypothesis. 
C)  Uncertain because the df and critical value are unknown. 
D)  Uncertain because the variances of the samples are unknown.

Question 10

If you find an F ratio of -2 in a one-factor ANOVA ($\alpha$= .05), you will

Accepted Answer

A)  reject the null hypothesis. 
B)  fail to reject the null hypothesis. 
C)  not be able to decide because the df and critical value are unknown. 
D)  conclude that a mistake has been made. 
A)  reject the null hypothesis. 
B)  fail to reject the null hypothesis. 
C)  not be able to decide because the df and critical value are unknown. 
D)  conclude that a mistake has been made.

Which assumption can be examined by Q-Q plots?

In ANOVA, which of the following statements occurs when H₀ is true?

In a one-factor ANOVA, if H₀ is rejected, we conclude that

Suppose n₁ = 15, n₂ = 13, n₃ = 17, n₄ =17. For a one-factor ANOVA, the df_total would be

The homoscedasticity assumption states that

Suppose n₁ = 15, n₂ = 13, n₃ = 17, n₄ =17. For a one-factor ANOVA, the df_betw would be

If you find an F ratio of 2 in a one-factor ANOVA ( $\alpha$ = .05), you will

Suppose that for a one-factor ANOVA with J = 3 and n = 10, two of the sample means are both equal to 4.5, but the other sample mean is 4.8. What conclusion will you make?

If you find an F ratio of -2 in a one-factor ANOVA ( $\alpha$ = .05), you will

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

Inferences About Variances

Bivariate Measures of Association

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 11: One-Factor Anova: Fixed-Effects Model

Which assumption can be examined by Q-Q plots?

In ANOVA, which of the following statements occurs when H0 is true?

In a one-factor ANOVA, if H0 is rejected, we conclude that

Suppose n1 = 15, n2 = 13, n3 = 17, n4 =17. For a one-factor ANOVA, the dftotal would be

The homoscedasticity assumption states that

Suppose n1 = 15, n2 = 13, n3 = 17, n4 =17. For a one-factor ANOVA, the dfbetw would be

If you find an F ratio of 2 in a one-factor ANOVA ( α\alphaα = .05), you will

Suppose that for a one-factor ANOVA with J = 3 and n = 10, two of the sample means are both equal to 4.5, but the other sample mean is 4.8. What conclusion will you make?

If you find an F ratio of -2 in a one-factor ANOVA ( α\alphaα = .05), you will

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

Inferences About Variances

Bivariate Measures of Association

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

In ANOVA, which of the following statements occurs when H₀ is true?

In a one-factor ANOVA, if H₀ is rejected, we conclude that

Suppose n₁ = 15, n₂ = 13, n₃ = 17, n₄ =17. For a one-factor ANOVA, the df_total would be

Suppose n₁ = 15, n₂ = 13, n₃ = 17, n₄ =17. For a one-factor ANOVA, the df_betw would be

If you find an F ratio of 2 in a one-factor ANOVA ( $\alpha$ = .05), you will

If you find an F ratio of -2 in a one-factor ANOVA ( $\alpha$ = .05), you will