Question 1

Which is not assumed in ANOVA?

Accepted Answer

A) Observations are independent. 
B) Populations are normally distributed. 
C) Variances of all treatment groups are the same. 
D) Population variances are known. 
A) Observations are independent. 
B) Populations are normally distributed. 
C) Variances of all treatment groups are the same. 
D) Population variances are known. D

Question 2

Sound levels are measured at random moments under typical driving conditions for various full-size truck models.The ANOVA results are shown below.     The test statistic for Hartley's test for homogeneity of variance is

Accepted Answer

A) 2.25 
B) 5.04 
C) 4.61 
D) 4.45 
A) 2.25 
B) 5.04 
C) 4.61 
D) 4.45 B

Question 3

What are the degrees of freedom for Hartley's test statistic for a one-factor ANOVA with n1 = 5,n2 = 8,n3 = 7,n4 = 8,n5 = 6,n6 = 8?

Accepted Answer

A) 7,6 
B) 6,6 
C) 6,41 
A) 7,6 
B) 6,6 
C) 6,41 B

Question 4

The Kruskal-Wallis test is equivalent to comparing medians in c groups.

Accepted Answer

A) True 
 B)False

Question 5

To test the null hypothesis H0: μ1 = μ2 = μ3 using samples from normal populations with unknown but equal variances,we

Accepted Answer

A) cannot safely use ANOVA. 
B) can safely employ ANOVA. 
C) would prefer three separate t-tests. 
D) would need three-factor ANOVA. 
A) cannot safely use ANOVA. 
B) can safely employ ANOVA. 
C) would prefer three separate t-tests. 
D) would need three-factor ANOVA.

Question 6

Which is not an assumption of ANOVA?

Accepted Answer

A) Normality of the treatment populations 
B) Homogeneous treatment variances 
C) Independent sample observations 
D) Equal population sizes for groups 
A) Normality of the treatment populations 
B) Homogeneous treatment variances 
C) Independent sample observations 
D) Equal population sizes for groups

Question 7

What are the degrees of freedom for Tukey's test statistic for a one-factor ANOVA with n1 = 6,n2 = 6,n3 = 6?

Accepted Answer

A) 3,6 
B) 6,3 
C) 6,15 
D) 3,15 
A) 3,6 
B) 6,3 
C) 6,15 
D) 3,15

Question 8

Refer to the following partial ANOVA results from Excel (some information is missing).   The F-test statistic is

Accepted Answer

A) 2.84 
B) 3.56 
C) 2.80 
D) 2.79 
A) 2.84 
B) 3.56 
C) 2.80 
D) 2.79

Question 9

ANOVA assumes equal variances within each treatment group.

Accepted Answer

A) True 
 B)False

Question 10

The Internal Revenue Service wishes to study the time required to process tax returns in three regional centers.A random sample of three tax returns is chosen from each of three centers.The time (in days)required to process each return is recorded as shown below.   Degrees of freedom for the between-groups sum of squares in the ANOVA would be

Accepted Answer

A) 11 
B) 2 
C) 4 
D) 6 
A) 11 
B) 2 
C) 4 
D) 6

Question 11

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA Table
  The p-value for the F-test would be

Accepted Answer

A) much less than .05. 
B) slightly less than .05. 
C) slightly greater than .05. 
D) much greater than .05. 
A) much less than .05. 
B) slightly less than .05. 
C) slightly greater than .05. 
D) much greater than .05.

Question 12

ANOVA is robust to violations of the equal-variance assumption as long as group sizes are equal.

Accepted Answer

A) True 
 B)False

Question 13

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA table
  The number of observations in the entire sample is

Accepted Answer

A) 20 
B) 19 
C) 22 
A) 20 
B) 19 
C) 22

Question 14

The Kruskal-Wallis test is often almost as powerful as one-factor ANOVA.

Accepted Answer

A) True 
 B)False

Question 15

Identify the degrees of freedom for the treatment and error in this one-factor ANOVA (blanks indicate missing information).

Accepted Answer

A) 4,24 
B) 3,20 
C) 5,23 
A) 4,24 
B) 3,20 
C) 5,23

Question 16

To compare the cost of three shipping methods,a random sample of four shipments is taken for each of three firms.The cost per shipment is shown below.   In a one-factor ANOVA,the degrees of freedom for the within-groups sum of squares will be

Accepted Answer

A) 11 
B) 3 
C) 9 
D) 2 
A) 11 
B) 3 
C) 9 
D) 2

Question 17

In a one-factor ANOVA,the computed value of F will be negative

Accepted Answer

A) when there is no difference in the treatment means. 
B) when there is no difference within the treatments. 
C) when the SST (total)is larger than SSE (error). 
D) under no circumstances. 
A) when there is no difference in the treatment means. 
B) when there is no difference within the treatments. 
C) when the SST (total)is larger than SSE (error). 
D) under no circumstances.

Question 18

The within-treatment variation reflects

Accepted Answer

A) variation among individuals of the same group. 
B) variation between individuals in different groups. 
C) variation explained by factors included in the ANOVA model. 
D) variation that is not part of the ANOVA model. 
A) variation among individuals of the same group. 
B) variation between individuals in different groups. 
C) variation explained by factors included in the ANOVA model. 
D) variation that is not part of the ANOVA model.

Question 19

Refer to the following partial ANOVA results from Excel (some information is missing).   The critical value of F at α = .05 is

Accepted Answer

A) 1.645 
B) 2.84 
C) 3.10 
D) 4.28 
A) 1.645 
B) 2.84 
C) 3.10 
D) 4.28

Question 20

Which is the Excel function to find the critical value of F for α = .05,df1 = 3,df2 = 25?

Accepted Answer

A) =F.DIST(.05,2,24) 
B) =F.INV.RT(.05,3,25) 
C) =F.DIST(.05,3,25) 
D) =F.INV(.05,2,24) 
A) =F.DIST(.05,2,24) 
B) =F.INV.RT(.05,3,25) 
C) =F.DIST(.05,3,25) 
D) =F.INV(.05,2,24)

Which is not assumed in ANOVA?

Sound levels are measured at random moments under typical driving conditions for various full-size truck models.The ANOVA results are shown below. The test statistic for Hartley's test for homogeneity of variance is

What are the degrees of freedom for Hartley's test statistic for a one-factor ANOVA with n1 = 5,n2 = 8,n3 = 7,n4 = 8,n5 = 6,n6 = 8?

The Kruskal-Wallis test is equivalent to comparing medians in c groups.

To test the null hypothesis H0: μ1 = μ2 = μ3 using samples from normal populations with unknown but equal variances,we

Which is not an assumption of ANOVA?

What are the degrees of freedom for Tukey's test statistic for a one-factor ANOVA with n1 = 6,n2 = 6,n3 = 6?

Refer to the following partial ANOVA results from Excel (some information is missing). The F-test statistic is

ANOVA assumes equal variances within each treatment group.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA Table The p-value for the F-test would be

ANOVA is robust to violations of the equal-variance assumption as long as group sizes are equal.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA table The number of observations in the entire sample is

The Kruskal-Wallis test is often almost as powerful as one-factor ANOVA.

Identify the degrees of freedom for the treatment and error in this one-factor ANOVA (blanks indicate missing information).

To compare the cost of three shipping methods,a random sample of four shipments is taken for each of three firms.The cost per shipment is shown below. In a one-factor ANOVA,the degrees of freedom for the within-groups sum of squares will be

In a one-factor ANOVA,the computed value of F will be negative

The within-treatment variation reflects

Refer to the following partial ANOVA results from Excel (some information is missing). The critical value of F at α = .05 is

Which is the Excel function to find the critical value of F for α = .05,df1 = 3,df2 = 25?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Simple Regression

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Chi-Square Tests

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Exam 11: Analysis of Variance

Which is not assumed in ANOVA?

Sound levels are measured at random moments under typical driving conditions for various full-size truck models.The ANOVA results are shown below. The test statistic for Hartley's test for homogeneity of variance is

What are the degrees of freedom for Hartley's test statistic for a one-factor ANOVA with n1 = 5,n2 = 8,n3 = 7,n4 = 8,n5 = 6,n6 = 8?

The Kruskal-Wallis test is equivalent to comparing medians in c groups.

To test the null hypothesis H0: μ1 = μ2 = μ3 using samples from normal populations with unknown but equal variances,we

Which is not an assumption of ANOVA?

What are the degrees of freedom for Tukey's test statistic for a one-factor ANOVA with n1 = 6,n2 = 6,n3 = 6?

Refer to the following partial ANOVA results from Excel (some information is missing). The F-test statistic is

ANOVA assumes equal variances within each treatment group.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA Table The p-value for the F-test would be

ANOVA is robust to violations of the equal-variance assumption as long as group sizes are equal.

Refer to the following partial ANOVA results from Excel (some information is missing). ANOVA table The number of observations in the entire sample is

The Kruskal-Wallis test is often almost as powerful as one-factor ANOVA.

Identify the degrees of freedom for the treatment and error in this one-factor ANOVA (blanks indicate missing information).

To compare the cost of three shipping methods,a random sample of four shipments is taken for each of three firms.The cost per shipment is shown below. In a one-factor ANOVA,the degrees of freedom for the within-groups sum of squares will be

In a one-factor ANOVA,the computed value of F will be negative

The within-treatment variation reflects

Refer to the following partial ANOVA results from Excel (some information is missing). The critical value of F at α = .05 is

Which is the Excel function to find the critical value of F for α = .05,df1 = 3,df2 = 25?

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Simple Regression

Multiple Regression

Chi-Square Tests

Filters