Question 1

The ANOVA is used to test the hypothesis that the group variances are equal.

Accepted Answer

A) True 
 B)False

Question 2

A company that sells honey wishes to find out if the strain of bee they use (strain 1) is the most productive bee available. To study the question the four available strains are tested at their research farm to see how much honey is produced by each type of bee. Test hives are set up and the number of ounces of honey each hive produces is recorded and given below. 
a. Are any a priori comparisons appropriate and if so which ones? 
b. Using a = .05 1 tail is there a difference between strain 1 and strain 2 using planned comparisons? 
c. Using a = 0.05 and the HSD test, which strains are different in the amount of honey they produce? 
d. Same as part c, using the Scheffé test.

Accepted Answer

a. A priori comparisons are appropriate

Question 3

SSbetween + SSwithin = SStotal .

Accepted Answer

A) True 
 B)False

Question 4

When doing post hoc comparisons, it is necessary to have a significant value for F obt before you can make the comparisons.

Accepted Answer

A) True 
 B)False

Question 5

When using multiple comparisons, a priori comparisons are more powerful than either the HSD or Scheffé tests.

Accepted Answer

A) True 
 B)False

Question 6

F obt = MSwithin / MSbetween

Accepted Answer

A) True 
 B)False

Question 7

The probability of making a Type II error is the same, regardless of sample size, for the HSD test.

Accepted Answer

A) True 
 B)False

Question 8

The reason we use MSwithin based on all the groups instead of just two groups in doing multiple comparisons is because it gives us the best estimate of µ .

Accepted Answer

A) True 
 B)False

Question 9

If ΣStotal = 20 and ΣS  between  = 14, ΣSwithin = _________.

Accepted Answer

A)  34 
B)  6 
C)  - 6 
D)  need more information 
A)  34 
B)  6 
C)  - 6 
D)  need more information

Question 10

Q obt can never be negative.

Accepted Answer

A) True 
 B)False

Question 11

The most powerful and most legitimate way of doing multiple comparisons is to plan to do all possible pairwise comparisons prior to the experiment.

Accepted Answer

A) True 
 B)False

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.   ΣSwithin = _________.

Accepted Answer

A)  62.25 
B)  59.75 
C)  56.65 
D)  57.00 
A)  62.25 
B)  59.75 
C)  56.65 
D)  57.00

Question 13

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.   ΣS  between  = _________.

Accepted Answer

A)  94.2 
B)  96.0 
C)  96.5 
D)  97.4 
A)  94.2 
B)  96.0 
C)  96.5 
D)  97.4

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, using a = .05. The critical value is _________.

Accepted Answer

A)  ± 2.262 
B)  - 1.833 
C)  ±2.228 
D)  3.95 
E)  3.20 
A)  ± 2.262 
B)  - 1.833 
C)  ±2.228 
D)  3.95 
E)  3.20

Question 15

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 wanted to compare drug levels 2 and 3 using planned comparisons and a nondirectional H 1 . Given   ,   ,   , n = 4, MSwithin = 6.639, df within = 9, df between  = 2, k = 3, the obtained value of the appropriate statistic is _________.

Accepted Answer

A)  Q obt = 4.46 
B)  t obt = -3.16 
C)  t obt = -3.15 
D)  t obt = -0.55 
A)  Q obt = 4.46 
B)  t obt = -3.16 
C)  t obt = -3.15 
D)  t obt = -0.55

Question 16

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.   MSwithin = _________.

Accepted Answer

A)  1.40 
B)  1.90 
C)  1.57 
D)  1.88 
A)  1.40 
B)  1.90 
C)  1.57 
D)  1.88

Question 17

In doing planned comparisons, we use _________.

Accepted Answer

A)  the t test for independent groups, unaltered 
B)  the t test for independent groups with MSwithin in the denominator 
C)  df equal to those of MSwithin 
D)  the t test for independent groups with MSwithin in the denominator and df equal to those of MSwithin 
A)  the t test for independent groups, unaltered 
B)  the t test for independent groups with MSwithin in the denominator 
C)  df equal to those of MSwithin 
D)  the t test for independent groups with MSwithin in the denominator and df equal to those of MSwithin

Question 18

Define single factor experiment, independent groups design.

Accepted Answer

A single factor experiment, also known a

Question 19

What is the value of F crit ? Use a = 0.05.

Accepted Answer

A)  5.14 
B)  4.76 
C)  4.46 
D)  4.07 
A)  5.14 
B)  4.76 
C)  4.46 
D)  4.07

Question 20

Define one-way analysis of variance, independent groups design.

Accepted Answer

One-way analysis of variance (ANOVA) wit

The ANOVA is used to test the hypothesis that the group variances are equal.

SS_between + SS_within = SS_total .

When doing post hoc comparisons, it is necessary to have a significant value for F obt before you can make the comparisons.

When using multiple comparisons, a priori comparisons are more powerful than either the HSD or Scheffé tests.

F obt = MS_within / MS_between

The probability of making a Type II error is the same, regardless of sample size, for the HSD test.

The reason we use MS_within based on all the groups instead of just two groups in doing multiple comparisons is because it gives us the best estimate of µ .

If ΣS_total = 20 and ΣS _between = 14, ΣS_within = _________.

Q obt can never be negative.

The most powerful and most legitimate way of doing multiple comparisons is to plan to do all possible pairwise comparisons prior to the experiment.

In doing planned comparisons, we use _________.

Define single factor experiment, independent groups design.

What is the value of F _crit ? Use a = 0.05.

Define one-way analysis of variance, independent groups design.

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

The ANOVA is used to test the hypothesis that the group variances are equal.

SSbetween + SSwithin = SStotal .

When doing post hoc comparisons, it is necessary to have a significant value for F obt before you can make the comparisons.

When using multiple comparisons, a priori comparisons are more powerful than either the HSD or Scheffé tests.

F obt = MSwithin / MSbetween

The probability of making a Type II error is the same, regardless of sample size, for the HSD test.

The reason we use MSwithin based on all the groups instead of just two groups in doing multiple comparisons is because it gives us the best estimate of µ .

If ΣStotal = 20 and ΣS between = 14, ΣSwithin = _________.

Q obt can never be negative.

The most powerful and most legitimate way of doing multiple comparisons is to plan to do all possible pairwise comparisons prior to the experiment.

In doing planned comparisons, we use _________.

Define single factor experiment, independent groups design.

What is the value of F crit ? Use a = 0.05.

Define one-way analysis of variance, independent groups design.

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

SS_between + SS_within = SS_total .

F obt = MS_within / MS_between

The reason we use MS_within based on all the groups instead of just two groups in doing multiple comparisons is because it gives us the best estimate of µ .

If ΣS_total = 20 and ΣS _between = 14, ΣS_within = _________.

What is the value of F _crit ? Use a = 0.05.