Question 1

Which of the following is NOT an assumption of an ANOVA?

Accepted Answer

A)  random selection 
B)  independent variable has only three levels 
C)  normally distributed population 
D)  samples come from populations with the same variances 
A)  random selection 
B)  independent variable has only three levels 
C)  normally distributed population 
D)  samples come from populations with the same variances

Question 2

To evaluate Tukey's HSD, consult the _____ table.

Accepted Answer

A)  z 
B)  F 
C)  q 
D)  R 
A)  z 
B)  F 
C)  q 
D)  R

Question 3

The F ratio is a ratio of:

Accepted Answer

A)  two (or more) sample means. 
B)  two variances. 
C)  sample means divided by sample variances. 
D)  two sum-of-squares estimates. 
A)  two (or more) sample means. 
B)  two variances. 
C)  sample means divided by sample variances. 
D)  two sum-of-squares estimates.

Question 4

Within-groups variance reflects the:

Accepted Answer

A)  amount of difference between means that we would expect to occur as a result of experimental manipulation. 
B)  average of the sample variances. 
C)  mean averages. 
D)  total amount of difference we would expect to occur, given both chance and experimental manipulation. 
A)  amount of difference between means that we would expect to occur as a result of experimental manipulation. 
B)  average of the sample variances. 
C)  mean averages. 
D)  total amount of difference we would expect to occur, given both chance and experimental manipulation.

Question 5

Changes in between-groups variance result in changes in the _____ of the F ratio.

Accepted Answer

A)  denominator 
B)  numerator 
C)  sign 
D)  significance 
A)  denominator 
B)  numerator 
C)  sign 
D)  significance

Question 6

Rousseau visually inspects her data before analyzing it only to find that the populations that she sampled appear to have very different variances although her sample sizes are equal.Which assumption of ANOVA has she violated and what should she do?

Accepted Answer

A)  Heteroscedasticity; she should analyze the data as is but not report it. 
B)  Heteroscedasticity; she should report it with her statistics after analyzing the data. 
C)  Homoscedasticity; she should proceed as long as the largest variance is not greater than two times the smallest variance and report it with her statistics. 
D)  Homoscedasticity; she should substitute some of the data points with the mean of each sample. 
A)  Heteroscedasticity; she should analyze the data as is but not report it. 
B)  Heteroscedasticity; she should report it with her statistics after analyzing the data. 
C)  Homoscedasticity; she should proceed as long as the largest variance is not greater than two times the smallest variance and report it with her statistics. 
D)  Homoscedasticity; she should substitute some of the data points with the mean of each sample.

Question 7

Henry is examining the effectiveness of using scare tactics to manipulate the behaviors of people living on the same island but in different regions, categorized as the beach, the valley, and the mountains.What is the first step Henry should follow for hypothesis testing?

Accepted Answer

A)  Identify population 1 as all beach inhabitants on the island, population 2 as all valley inhabitants on the island, and population 3 as all mountain inhabitants on the island.He should also use a t distribution to make comparisons employing a paired-samples t test. 
B)  State the null hypothesis-there is no difference between locations on the effectiveness of scare tactics in manipulating behavior-and the research hypothesis-at least one group of island inhabitants will exhibit different behaviors as a result of the scare tactics. 
C)  Use the F distribution with 2 and 51 degrees of freedom. 
D)  Identify population 1 as all beach inhabitants on the island, population 2 as all valley inhabitants on the island, and population 3 as all mountain inhabitants on the island.He should also use an F distribution with a one-way between-groups ANOVA. 
A)  Identify population 1 as all beach inhabitants on the island, population 2 as all valley inhabitants on the island, and population 3 as all mountain inhabitants on the island.He should also use a t distribution to make comparisons employing a paired-samples t test. 
B)  State the null hypothesis-there is no difference between locations on the effectiveness of scare tactics in manipulating behavior-and the research hypothesis-at least one group of island inhabitants will exhibit different behaviors as a result of the scare tactics. 
C)  Use the F distribution with 2 and 51 degrees of freedom. 
D)  Identify population 1 as all beach inhabitants on the island, population 2 as all valley inhabitants on the island, and population 3 as all mountain inhabitants on the island.He should also use an F distribution with a one-way between-groups ANOVA.

Question 8

The Bonferroni, Scheffé, and Tukey are all examples of:

Accepted Answer

A)  hypothesis tests. 
B)  post hoc tests. 
C)  effect size statistics. 
D)  confidence intervals. 
A)  hypothesis tests. 
B)  post hoc tests. 
C)  effect size statistics. 
D)  confidence intervals.

Which of the following is NOT an assumption of an ANOVA?

To evaluate Tukey's HSD, consult the _____ table.

The F ratio is a ratio of:

Within-groups variance reflects the:

Changes in between-groups variance result in changes in the _____ of the F ratio.

Rousseau visually inspects her data before analyzing it only to find that the populations that she sampled appear to have very different variances although her sample sizes are equal.Which assumption of ANOVA has she violated and what should she do?

Henry is examining the effectiveness of using scare tactics to manipulate the behaviors of people living on the same island but in different regions, categorized as the beach, the valley, and the mountains.What is the first step Henry should follow for hypothesis testing?

The Bonferroni, Scheffé, and Tukey are all examples of:

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters

Exam 12: One-Way Between-Groups Anova

Which of the following is NOT an assumption of an ANOVA?

To evaluate Tukey's HSD, consult the _____ table.

The F ratio is a ratio of:

Within-groups variance reflects the:

Changes in between-groups variance result in changes in the _____ of the F ratio.

Rousseau visually inspects her data before analyzing it only to find that the populations that she sampled appear to have very different variances although her sample sizes are equal.Which assumption of ANOVA has she violated and what should she do?

Henry is examining the effectiveness of using scare tactics to manipulate the behaviors of people living on the same island but in different regions, categorized as the beach, the valley, and the mountains.What is the first step Henry should follow for hypothesis testing?

The Bonferroni, Scheffé, and Tukey are all examples of:

An Introduction to Statistics and Research Design

Frequency Distributions

Visual Displays of Data

Central Tendency and Variability

Sampling and Probability

The Normal Curve, Standardization and Z Scores

Hypothesis Testing With Z Tests

Confidence Intervals, Effect Size, and Statistical Power

The Single-Sample T Test

The Paired-Samples T Test

The Independent-Samples T Test

One-Way Within-Groups Anova

Two-Way Between-Groups Anova

Correlation

Regression

Chi-Square Tess

Choosing and Reporting Statistics

Filters