Question 1

F-ratios can be negative.

Accepted Answer

A) True 
 B)False

Question 2

One-way ANOVA can be used to compare any number of groups on one outcome variable.

Accepted Answer

A) True 
 B)False

Question 3

If n = 10 and k = 3, what is dfB?

Accepted Answer

A)  2 
B)  3 
C)  9 
D)  7 
A)  2 
B)  3 
C)  9 
D)  7

Question 4

When we want to compare more than 2 groups, we should use an ANOVA instead of a t-test because ______.

Accepted Answer

A)  you cannot compare the means between all groups simultaneously with t-tests 
B)  you cannot take into account the variability for all samples with t-tests 
C)  you increase the chance of making a Type I error 
D)  all of these 
A)  you cannot compare the means between all groups simultaneously with t-tests 
B)  you cannot take into account the variability for all samples with t-tests 
C)  you increase the chance of making a Type I error 
D)  all of these

Question 5

An n-way ANOVA should be used instead of one-way ANOVA when you have more than one outcome variable.

Accepted Answer

A) True 
 B)False

Question 6

Which of these is an appropriate formal test of the null hypothesis for one-way ANOVA if dfW = 10, dfB = 3, F = 1.25, and your p-value is .6?

Accepted Answer

A) F(3,10) = 1.25, p > .05 B) F(10,3) = 1.25, p > .05 C) F(3,10) = 1.25, p < .05 D) F(10,3) = 1.25, p < .05 A) F(3,10) = 1.25, p > .05 B) F(10,3) = 1.25, p > .05 C) F(3,10) = 1.25, p < .05 D) F(10,3) = 1.25, p < .05

Question 7

When is appropriate to use an n-way ANOVA instead of a one-way ANOVA? Provide an example of a business setting where n-way ANOVA might be used.

Accepted Answer

n-way ANOVA is used when we want to exam

Question 8

If two groups are in the same homogeneous subgroup, they are significantly different from each other.

Accepted Answer

A) True 
 B)False

Question 9

For one-way ANOVA, when F1F1F1S1F1F1F10 = .05, the critical value when k = 3 and dfw = 10 is 4.10.

Accepted Answer

A) True 
 B)False

Question 10

Mean square is the average sum of squares per degree of freedom.

Accepted Answer

A) True 
 B)False

Question 11

When using an ANOVA to compare between groups ______.

Accepted Answer

A)  you use variance between the groups to determine how much the means differ 
B)  you use mean differences between all groups to determine how much the means differ 
C)  you use mean difference between 2 groups at a time in all combinations to determine how much means differ 
D)  none of these 
A)  you use variance between the groups to determine how much the means differ 
B)  you use mean differences between all groups to determine how much the means differ 
C)  you use mean difference between 2 groups at a time in all combinations to determine how much means differ 
D)  none of these

Question 12

If you want to determine differences due to both department (managers, sales, warehouse) and gender (male, female) on one outcome, you should conduct a ______.

Accepted Answer

A)  one-way ANOVA 
B)  n-way ANOVA 
C)  independent-samples t-test 
D)  none of these 
A)  one-way ANOVA 
B)  n-way ANOVA 
C)  independent-samples t-test 
D)  none of these

Question 13

A researcher reports the following information: F(3, 20) = 4.67. What is the correct decision?

Accepted Answer

A)  Reject the null if α = .05 and retain the null if α = .01. 
B)  Retain the null if α = .05 and retain the null if α = .01. 
C)  Reject the null if α = .05 and reject the null if α = .01. 
D)  Retain the null if α = .05 and reject the null if α = .01. 
A)  Reject the null if α = .05 and retain the null if α = .01. 
B)  Retain the null if α = .05 and retain the null if α = .01. 
C)  Reject the null if α = .05 and reject the null if α = .01. 
D)  Retain the null if α = .05 and reject the null if α = .01.

Question 14

You collect data on the length sales calls from four departments within an organization. Which of the following would the appropriate representation of the alternative hypothesis?

Accepted Answer

A)  μ1 ≠ μ2 ≠ μ3 ≠ μ4 
B)  at least two means differ 
C)  all of the means differ 
D)  all of these 
A)  μ1 ≠ μ2 ≠ μ3 ≠ μ4 
B)  at least two means differ 
C)  all of the means differ 
D)  all of these

Question 15

Describe the purpose of a post hoc test and when one should be used.

Accepted Answer

Post hoc tests are used to determine if

F-ratios can be negative.

One-way ANOVA can be used to compare any number of groups on one outcome variable.

If n = 10 and k = 3, what is df_B?

When we want to compare more than 2 groups, we should use an ANOVA instead of a t-test because ______.

An n-way ANOVA should be used instead of one-way ANOVA when you have more than one outcome variable.

Which of these is an appropriate formal test of the null hypothesis for one-way ANOVA if df_W = 10, df_B= 3, F = 1.25, and your p-value is .6?

When is appropriate to use an n-way ANOVA instead of a one-way ANOVA? Provide an example of a business setting where n-way ANOVA might be used.

If two groups are in the same homogeneous subgroup, they are significantly different from each other.

For one-way ANOVA, when  = .05, the critical value when k= 3 and df_w = 10 is 4.10.

Mean square is the average sum of squares per degree of freedom.

When using an ANOVA to compare between groups ______.

If you want to determine differences due to both department (managers, sales, warehouse) and gender (male, female) on one outcome, you should conduct a ______.

A researcher reports the following information: F(3, 20) = 4.67. What is the correct decision?

You collect data on the length sales calls from four departments within an organization. Which of the following would the appropriate representation of the alternative hypothesis?

Describe the purpose of a post hoc test and when one should be used.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

Exam 10: Analysis of Variance Anova

F-ratios can be negative.

One-way ANOVA can be used to compare any number of groups on one outcome variable.

If n = 10 and k = 3, what is dfB?

When we want to compare more than 2 groups, we should use an ANOVA instead of a t-test because ______.

An n-way ANOVA should be used instead of one-way ANOVA when you have more than one outcome variable.

Which of these is an appropriate formal test of the null hypothesis for one-way ANOVA if dfW = 10, dfB = 3, F = 1.25, and your p-value is .6?

When is appropriate to use an n-way ANOVA instead of a one-way ANOVA? Provide an example of a business setting where n-way ANOVA might be used.

If two groups are in the same homogeneous subgroup, they are significantly different from each other.

For one-way ANOVA, when  = .05, the critical value when k = 3 and dfw = 10 is 4.10.

Mean square is the average sum of squares per degree of freedom.

When using an ANOVA to compare between groups ______.

If you want to determine differences due to both department (managers, sales, warehouse) and gender (male, female) on one outcome, you should conduct a ______.

A researcher reports the following information: F(3, 20) = 4.67. What is the correct decision?

You collect data on the length sales calls from four departments within an organization. Which of the following would the appropriate representation of the alternative hypothesis?

Describe the purpose of a post hoc test and when one should be used.

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Tests for Significance: Paired and Independent-Samples T-Test

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

If n = 10 and k = 3, what is df_B?

Which of these is an appropriate formal test of the null hypothesis for one-way ANOVA if df_W = 10, df_B= 3, F = 1.25, and your p-value is .6?

For one-way ANOVA, when  = .05, the critical value when k= 3 and df_w = 10 is 4.10.