Question 1

Which of the following regarding ANOVA and regression are true?

Accepted Answer

A)   Whereas ANOVA is utilized for categorical independent variables, regression is only used for continuous independent variables
B)   Any data that is analyzed with ANOVA can be analyzed with regression yielding the same outcomes.
C)   ANOVA and regression have little in common. ANOVA is only used to analyze up to two factors at once, whereas regression analyses can include a much larger number of variables.
D)   ANOVA can be used to analyze experimental designs that allow for causal claims, whereas regression is only used for correlational analyses that do not afford causal inferences. B

Question 2

Spearman's rho is a more conservative test and requires more assumptions than Pearson's r.

Accepted Answer

A) True 
 B)False  False

Question 3

The Welch's t test is a parametric test that has fewer assumptions than an independent groups t-test.

Accepted Answer

A) True 
 B)False  True

Question 4

What is not true in a parametric statistical analysis?

Accepted Answer

A)   Rank order of data points are important
B)   The data should be normally distributed
C)   The variance is taken into account
D)   Sample size does not influence probability of a significant result

Question 5

Describe the three main conceptual components to a Bayesian analysis.

Accepted Answer

The answer of Describe the three main conceptual components to...

Question 6

The η2 from a between-subjects one-way ANOVA tells you whether or not your results are due to chance.

Accepted Answer

A) True 
 B)False

Question 7

A researcher is interested in the effect of maternal warmth on academic achievement. He devised a scale that measures warmth and uses student GPA has a measure of academic achievement. He finds that the correlation between the two variables is .60 and has a regression coefficient of .15. Which of the following statements is most accurate?

Accepted Answer

A)   The researcher can conclude that a one unit increase in maternal warmth will cause a .15 decrease in GPA.
B)   Maternal warmth explains 36% of the sample's variation in GPA
C)   Students' GPA are lower for mothers who exhibit more warmth
D)   The researcher can conclude that a one unit increase in maternal warmth is associated with a .60 increase in GPA.

Question 8

The sums of squares in an ANOVA test measure the amount of variability in the data.

Accepted Answer

A) True 
 B)False

Question 9

To check whether the assumption of equal variances across the different groups holds in order to conduct an ANOVA test, researchers refer to the Levene's test.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is not an assumption of the independent samples t-test?

Accepted Answer

A)   The data is interval or ratio.
B)   Observations are unrelated.
C)   The two populations being compared have equal variances.
D)   The effect size is not zero.

Question 11

A researcher analyzed his data using an independent samples t test and found that the 95% confidence interval of the difference between two means ranges from -0.54 to -0.20. Which of the following is true?

Accepted Answer

A)   The means for both groups must be negative.
B)   Both groups have a negative association.
C)   The means for both groups are not equal to one another.
D)   Both groups are different from each other 95% of the time.

Question 12

The number of degrees of freedom (df) is the number of experimental data that have contributed to the test statistic.

Accepted Answer

A) True 
 B)False

Question 13

The non-parametric alternative of a matched-pairs t test is the:

Accepted Answer

A)   Mann-Whitney U test.
B)   Bayesian approach.
C)   Wilcoxon signed-rank test.
D)   point-biserial correlation.

Question 14

Which of the following is true?

Accepted Answer

A)   Independent samples t test is used when your conditions are run within subjects.
B)   Effect sizes can be computed for both between subject designs and within subject designs.
C)   If you have more than one comparison group and all your conditions are run between subjects, then the test to use is a mixed ANOVA.
D)   In a between subjects design with two groups and one factor, you should only use the t test and not a one-way ANOVA.

Question 15

The purpose of objective priors in Bayesian analysis is to provide researchers with a prior distribution that makes no assumptions whatsoever.

Accepted Answer

A) True 
 B)False

Question 16

What is an additional concern in terms of assumptions that one must check when conducting repeated measures design that is not a concern in a between subjects design?

Accepted Answer

A)   homogeneity of variance
B)   normality
C)   independence
D)   sphercity

Question 17

According to your textbook, violation of sphericity when using a repeated measures design is likely to affect which of the following?

Accepted Answer

A)   The probability of committing a Type I error.
B)   The probability of committing a Type II error.
C)   The probability of increasing findings that reflect the null hypothesis.
D)   The probability of having skewed data.

Question 18

Jessica wants to analyze her data using an independent samples t test. However, she is unsure about whether her data violates the assumption of equal variances across groups. List two types of tests or techniques that Jessica might use in place of an independent samples t test. In your answer, specify whether each solution is a parametric or non-parametric method.

Accepted Answer

The answer of Jessica wants to analyze her data using...

Question 19

The table below presents the results of a between subjects one-way ANOVA experiment. refer to this table.
 
-What is the value of F?

Accepted Answer

A)   8
B)   3
C)   30
D)   3.68

Question 20

The table below presents the results of a between subjects one-way ANOVA experiment. refer to this table.
 
-What is the value of the within subjects degrees of freedom?

Accepted Answer

A)   24
B)   1
C)   27
D)   29

Exam 14: Analyzing Your Data II: Specific Approaches

Which of the following regarding ANOVA and regression are true?

Spearman's rho is a more conservative test and requires more assumptions than Pearson's r.

The Welch's t test is a parametric test that has fewer assumptions than an independent groups t-test.

What is not true in a parametric statistical analysis?

Describe the three main conceptual components to a Bayesian analysis.

The η² from a between-subjects one-way ANOVA tells you whether or not your results are due to chance.

The sums of squares in an ANOVA test measure the amount of variability in the data.

To check whether the assumption of equal variances across the different groups holds in order to conduct an ANOVA test, researchers refer to the Levene's test.

Which of the following is not an assumption of the independent samples t-test?

A researcher analyzed his data using an independent samples t test and found that the 95% confidence interval of the difference between two means ranges from -0.54 to -0.20. Which of the following is true?

The number of degrees of freedom (df) is the number of experimental data that have contributed to the test statistic.

The non-parametric alternative of a matched-pairs t test is the:

Which of the following is true?

The purpose of objective priors in Bayesian analysis is to provide researchers with a prior distribution that makes no assumptions whatsoever.

What is an additional concern in terms of assumptions that one must check when conducting repeated measures design that is not a concern in a between subjects design?

According to your textbook, violation of sphericity when using a repeated measures design is likely to affect which of the following?

The table below presents the results of a between subjects one-way ANOVA experiment. refer to this table. -What is the value of F?

The table below presents the results of a between subjects one-way ANOVA experiment. refer to this table. -What is the value of the within subjects degrees of freedom?