Question 1

In the HSD test where k = 3 if the lowest and highest pair comparison is nonsignificant, none of the other comparisons will be significant either.

Accepted Answer

A) True 
 B)False

Question 2

Explain how the Q distributions were developed. How does this compare to the t distributions?

Accepted Answer

The Q distributions were developed as a

Question 3

The total variance of a set of data can be completely partitioned into the between-groups variance and the within-groups variance.

Accepted Answer

A) True 
 B)False

Question 4

The one-way ANOVA assumes s 12 = s 22 = s 32 = s k 2 .

Accepted Answer

A) True 
 B)False

Question 5

A clinical psychologist is interested in comparing the effectiveness of short term relaxation and cognitive-behavioral therapy in treating mild depression. An experiment is conducted in which 15 patients with mild depression are randomly selected and assigned 5 each to a relaxation therapy group, a cognitive/behavioral therapy group, and an attention placebo group. Therapy is administered until the patient is judged no longer depressed or until 10 treatment sessions have elapsed. The following data is obtained. Scores are the number of sessions for each patient.   Using the Scheffé test with a = 0.05, F crit = _________.

Accepted Answer

A)  5.95 
B)  3.88 
C)  6.93 
D)  3.49 
A)  5.95 
B)  3.88 
C)  6.93 
D)  3.49

Question 6

MSwithin is sensitive to the effects of the independent variable.

Accepted Answer

A) True 
 B)False

Question 7

The value used in the Scheffé test to evaluate is _________.

Accepted Answer

A)  the df computed on groups i and j 
B)  MSwithin taken from the entire ANOVA 
C)  the df computed in planned comparisons 
D)  MSwithin ( groups i and j ) 
A)  the df computed on groups i and j 
B)  MSwithin taken from the entire ANOVA 
C)  the df computed in planned comparisons 
D)  MSwithin ( groups i and j )

Question 8

An investigator conducts an experiment involving the effects of three levels of a drug on memory. Subjects are randomly assigned to one of three conditions. A different drug level is administered in each condition. Memory is measured 10 minutes after each subject receives the drug. The following scores are recorded. The higher the score, the better the memory.   F obt = _________.

Accepted Answer

A)  8.31 
B)  7.30 
C)  7.27 
D)  6.45 
A)  8.31 
B)  7.30 
C)  7.27 
D)  6.45

Question 9

The null hypothesis in the analysis of variance states that µ 1 = µ 2 = µ 3 = u k

Accepted Answer

A) True 
 B)False

Question 10

An ANOVA can only be used when n 1 = n 2 = . . . = n k .

Accepted Answer

A) True 
 B)False

Question 11

The alternative hypothesis evaluated by F obt in the one-way ANOVA states that _________.

Accepted Answer

A)  all conditions have the same effect 
B)  one or more of the conditions have different effects 
C)  µ 1 = µ 2 = u 3 = µ k 
D)  µ 1 ≠ µ 2 ≠ µ 3 ≠ µ k 
E)  b and d 
A)  all conditions have the same effect 
B)  one or more of the conditions have different effects 
C)  µ 1 = µ 2 = u 3 = µ k 
D)  µ 1 ≠ µ 2 ≠ µ 3 ≠ µ k 
E)  b and d

Question 12

An investigator conducts an experiment involving the effects of three levels of a drug on memory. Subjects are randomly assigned to one of three conditions. A different drug level is administered in each condition. Memory is measured 10 minutes after each subject receives the drug. The following scores are recorded. The higher the score, the better the memory.   Using a = 0.05, F crit = _________.

Accepted Answer

A)  8.02 
B)  4.26 
C)  19.38 
D)  4.46 
A)  8.02 
B)  4.26 
C)  19.38 
D)  4.46

Question 13

What is the value of ΣStotal if ΣSbetween = 236 and ΣSwithin = 54?

Accepted Answer

A)  290 
B)  182 
C)  4.37 
D)  100 
A)  290 
B)  182 
C)  4.37 
D)  100

Question 14

An investigator conducts an experiment involving the effects of three levels of a drug on memory. Subjects are randomly assigned to one of three conditions. A different drug level is administered in each condition. Memory is measured 10 minutes after each subject receives the drug. The following scores are recorded. The higher the score, the better the memory.   Assume you are doing planned comparisons evaluating drug levels 2 and 3 using a = 0.05 and H 1 is nondirectional. What is your conclusion?

Accepted Answer

A)  accept H 0 ; the drug has the same effect at these levels 
B)  retain H 0 ; we cannot conclude the drug has a different effect at these levels 
C)  reject H 0 ; the groups are not significantly different 
D)  reject H 0 ; the drug has different effects at these levels 
A)  accept H 0 ; the drug has the same effect at these levels 
B)  retain H 0 ; we cannot conclude the drug has a different effect at these levels 
C)  reject H 0 ; the groups are not significantly different 
D)  reject H 0 ; the drug has different effects at these levels

Question 15

The Scheffé test controls for dong multiple comparisons by using F crit from the ANOVA

Accepted Answer

A) True 
 B)False

Question 16

Variance ratio is the statistic underlying the F distribution.

Accepted Answer

A) True 
 B)False

Question 17

A value of - 1.0 for F obt is never possible if the calculations are done correctly.

Accepted Answer

A) True 
 B)False

Question 18

It is possible to have an overall F that is significant and have all the a priori comparisons be nonsignificant.

Accepted Answer

A) True 
 B)False

Question 19

Using 2, what is the estimated size of effect?

Accepted Answer

A)  0.7232 
B)  0.6852 
C)  0.6582 
D)  0.6312 
A)  0.7232 
B)  0.6852 
C)  0.6582 
D)  0.6312

Question 20

A clinical psychologist is interested in comparing the effectiveness of short term relaxation and cognitive-behavioral therapy in treating mild depression. An experiment is conducted in which 15 patients with mild depression are randomly selected and assigned 5 each to a relaxation therapy group, a cognitive/behavioral therapy group, and an attention placebo group. Therapy is administered until the patient is judged no longer depressed or until 10 treatment sessions have elapsed. The following data is obtained. Scores are the number of sessions for each patient.   Estimate the size of the effect. ç 2 = _________.

Accepted Answer

A)  0.5530 
B)  0.5034 
C)  0.6232 
D)  0.5341 
A)  0.5530 
B)  0.5034 
C)  0.6232 
D)  0.5341

In the HSD test where k = 3 if the lowest and highest pair comparison is nonsignificant, none of the other comparisons will be significant either.

Explain how the Q distributions were developed. How does this compare to the t distributions?

The total variance of a set of data can be completely partitioned into the between-groups variance and the within-groups variance.

The one-way ANOVA assumes s 12 = s 22 = s 32 = s k 2 .

MS_within is sensitive to the effects of the independent variable.

The value used in the Scheffé test to evaluate is _________.

The null hypothesis in the analysis of variance states that µ 1 = µ 2 = µ 3 = u k

An ANOVA can only be used when n 1 = n 2 = . . . = n k .

The alternative hypothesis evaluated by F _obt in the one-way ANOVA states that _________.

What is the value of ΣS_total if ΣS_between = 236 and ΣS_within = 54?

The Scheffé test controls for dong multiple comparisons by using F _crit from the ANOVA

Variance ratio is the statistic underlying the F distribution.

A value of - 1.0 for F obt is never possible if the calculations are done correctly.

It is possible to have an overall F that is significant and have all the a priori comparisons be nonsignificant.

Using ², what is the estimated size of effect?

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

Exam 15: Introduction to the Analysis of Variance

In the HSD test where k = 3 if the lowest and highest pair comparison is nonsignificant, none of the other comparisons will be significant either.

Explain how the Q distributions were developed. How does this compare to the t distributions?

The total variance of a set of data can be completely partitioned into the between-groups variance and the within-groups variance.

The one-way ANOVA assumes s 12 = s 22 = s 32 = s k 2 .

MSwithin is sensitive to the effects of the independent variable.

The value used in the Scheffé test to evaluate is _________.

The null hypothesis in the analysis of variance states that µ 1 = µ 2 = µ 3 = u k

An ANOVA can only be used when n 1 = n 2 = . . . = n k .

The alternative hypothesis evaluated by F obt in the one-way ANOVA states that _________.

What is the value of ΣStotal if ΣSbetween = 236 and ΣSwithin = 54?

The Scheffé test controls for dong multiple comparisons by using F crit from the ANOVA

Variance ratio is the statistic underlying the F distribution.

A value of - 1.0 for F obt is never possible if the calculations are done correctly.

It is possible to have an overall F that is significant and have all the a priori comparisons be nonsignificant.

Using 2, what is the estimated size of effect?

Statistics and Scientific Method

Basic Mathematical and Measurement Concepts

Frequency Distributions

Measures of Central Tendency and Variability

The Normal Curve and Standard Scores

Correlation

Linear Regression

Random Sampling and Probability

Binomial Distribution

Introduction to Hypothesis Testing: Using the Sign Test

Power

Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

Students T Test for Single Samples

Students T Test for Correlated and Independent Groups

Introduction to the Two-Way Analysis of Variance

Chi-Square and Other Nonparametric Tests

Filters

MS_within is sensitive to the effects of the independent variable.

The alternative hypothesis evaluated by F _obt in the one-way ANOVA states that _________.

What is the value of ΣS_total if ΣS_between = 236 and ΣS_within = 54?

The Scheffé test controls for dong multiple comparisons by using F _crit from the ANOVA

Using ², what is the estimated size of effect?