Question 1

A histogram displays data points that most frequently cluster close to the y-axis with few data points on the right side of the graph. A histogram displaying this trend suggests what kind of dataset?

Accepted Answer

A)   A positively skewed dataset
B)   A negatively skewed dataset
C)   A normally distributed dataset
D)   None of the above A

Question 2

The mean should only be calculated for interval and ratio data.

Accepted Answer

A) True 
 B)False  True

Question 3

In a meta-analysis, you are interested in whether there are meaningful differences in the study results under review. What value would you look at to determine the meaningfulness?

Accepted Answer

A)   The p-value
B)   Effect size
C)   The strength of the correlation coefficient
D)   None of the above B

Question 4

Discuss when you would use an ANOVA and discuss when and why you would conduct a post-hoc test.

Accepted Answer

The answer of Discuss when you would use an ANOVA...

Question 5

Which of the following describes when Type I errors occur?

Accepted Answer

A)   The null hypothesis is rejected when, in fact, it is true.
B)   The wrong statistical analysis is completed.
C)   When there is an ethical error.
D)   When the null hypothesis is accepted when, in fact, it is false.

Question 6

When ordinal data are used, what is the association between the data called?

Accepted Answer

A)   Spearman Rank correlation coefficient
B)   Regression coefficient
C)   Pearson product moment correlation coefficient
D)   Correlation coefficient

Question 7

A researcher is interested in determining whether exercise-related new year's resolution goals predict the time spent exercising. What analysis should they use?

Accepted Answer

A)   Regression analysis
B)   ANOVA
C)   Correlation
D)   Independent t-test

Question 8

Describe how you would calculate the interquartile range.

Accepted Answer

The answer of Describe how you would calculate the interquartile...

Question 9

Parametric tests are to ________ as non-parametric tests are to ________.

Accepted Answer

A)   means; frequencies
B)   frequencies; means
C)   interval and/ or ratio data; nominal and/ or ordinal data
D)   Both a and c

Question 10

A classification system where two or more groups respond on two or more categories or outcomes is visually represented through which of the following?

Accepted Answer

A)   Histogram
B)   Contingency table
C)   Boxplot
D)   Frequency polygon

Question 11

What is a meta-analysis? Discuss why a researcher would want to conduct a meta-analysis and the purpose of calculating the effect size in a meta-analysis.

Accepted Answer

The answer of What is a meta-analysis? Discuss why a...

Question 12

When is practical significance often valued over statistical significance?

Accepted Answer

A)   In quantitative studies
B)   In clinical trials
C)   When observed effects are extremely valuable
D)   Both b and c

Question 13

Main effects and interaction effects can be present within what type of statistical analysis?

Accepted Answer

A)   Regression
B)   Factorial ANOVA
C)   Paired samples t-test
D)   Chi-square

Question 14

You calculate a sample mean for three different groups. The accuracy of the average of the sample means is reflected by which of the following?

Accepted Answer

A)   Standard error
B)   Variance
C)   Standard error of the mean
D)   Degrees of freedom

Question 15

Measures of variability only provide information regarding how the scores vary.

Accepted Answer

A) True 
 B)False

Question 16

A "pointy" distribution (i.e., few high scores and low scores with more frequent scores in the middle) is an example of a distribution that can be describe by which of the following terms?

Accepted Answer

A)   Platykurtic
B)   Leptokurtic
C)   Mesokurtic
D)   Normally distributed

Question 17

What does rejecting the null hypothesis suggest?

Accepted Answer

A)   A statistical significance
B)   Type II error
C)   No statistical significance
D)   Type I error

Question 18

Briefly discuss a scenario where an analysis of covariance would be beneficial.

Accepted Answer

The answer of Briefly discuss a scenario where an analysis...

Question 19

Histogram graphs are useful for quickly examining the distribution and shape of the collected data.

Accepted Answer