Question 1

The data below that records the number of inches of snowfall in different parts of the country
 $\begin{array}{llcc}
\hline Score \
\hline 22\
24\
26\
47\
52\
36\
44\
26\
35\
59\
21\
\hline
\end{array}$
 What is the 7th rank?

Accepted Answer

36

Question 2

If you have 12 pairs of participants what is your critical value for a two-tailed Wilcoxon Signed-rank test at $\alpha$ = .01?

Accepted Answer

A)  7 
B)  3 
C)  5 
D)  9 
A)  7 
B)  3 
C)  5 
D)  9 A

Question 3

A researcher conducted a correlational study. He studied the relationship between individuals' perceptions of their own bodies on a rating scale (higher scores meant most positive self-perception) and their perception of the college (higher scores meant more positive perception of the college). He found a spearman correlation of -.68 and the result is statistically significant. What does this mean?

Accepted Answer

A)  Body image and college ratings are positively correlated: those who have better self-perception of their body had worse perceptions of the college. 
B)  Body image and college ratings are positively correlated: those who have better self-perception of their body had better perceptions of the college 
C)  Body image and college ratings are negatively correlated: as self-perception of one's body got higher, perception of the college got lower. 
D)  Body image and college ratings are negatively correlated: as self-perception of one's body got higher, perception of the college got higher. 
A)  Body image and college ratings are positively correlated: those who have better self-perception of their body had worse perceptions of the college. 
B)  Body image and college ratings are positively correlated: those who have better self-perception of their body had better perceptions of the college 
C)  Body image and college ratings are negatively correlated: as self-perception of one's body got higher, perception of the college got lower. 
D)  Body image and college ratings are negatively correlated: as self-perception of one's body got higher, perception of the college got higher. C

Question 4

The Mann-Whitney U test is a nonparametric method that compares means between two groups

Accepted Answer

A) True 
 B)False

Question 5

A researcher hypothesizes that individuals' interest in politics is related to the amount of television they watch. He asks participants to rate on a scale from 1 (not interested at all) to 10 (extremely interested) the extent to which they are interested in politics, and also asks for the amount of television they watch. Below are the data
 $$\begin{array} { c c } 
\hline \text { Interest } & \text { TV } \
\hline 6 & 45 \
5 & 79 \
7 & 110 \
7 & 75 \
9 & 163 \
3 & 60 \
4 & 85 \
1 & 64 \
7 & 80 \
2 & 30 \
8 & 40 \
9 & 90 \
3 & 120 \
5 & 90 \
\hline
\end{array}$$ If calculating a spearman correlation, what is the null hypothesis?

Accepted Answer

There is no correlat

Question 6

The Wilcoxon signed-rank test should be used in place of its parametric equivalent when the data is non-normal or on an ordinal scale

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is not an assumption of parametric tests?

Accepted Answer

A)  Observations are independent 
B)  The data are either on an interval or ratio scale 
C)  Central limit theorem holds 
D)  The data are skewed positive. 
A)  Observations are independent 
B)  The data are either on an interval or ratio scale 
C)  Central limit theorem holds 
D)  The data are skewed positive.

Question 8

Consider the following dataset on standardized test scores: 134, 145, 142, 145, 146, 152, 155, 155, 159. There are _______ ties and the score 152 is in the _____ rank.

Accepted Answer

A)  2; 6 
B)  3; 6 
C)  2; 5.5 
D)  3; 5.5 
A)  2; 6 
B)  3; 6 
C)  2; 5.5 
D)  3; 5.5

Question 9

Which of the following characteristics would lead you to choose a non-parametric test over a parametric test?

Accepted Answer

A)  Skewed data 
B)  Having data that is not normally distributed 
C)  Data that are ranked 
D)  All of the above 
A)  Skewed data 
B)  Having data that is not normally distributed 
C)  Data that are ranked 
D)  All of the above

Question 10

Nonparametric tests do not necessarily test differences between means .

Accepted Answer

A) True 
 B)False

Question 11

Data on an ordinal scale are generally analyzed by…

Accepted Answer

A)  nonparametric analyses 
B)  parametric analyses 
C)  either parametric or nonparametric analyses 
D)  there is insufficient information about the data. 
A)  nonparametric analyses 
B)  parametric analyses 
C)  either parametric or nonparametric analyses 
D)  there is insufficient information about the data.

Question 12

The Perception of Competitiveness Scale (PCS) developed by Carter and Weissbrod (2011) is a likert scale. If you assume that the scale is ordinal and are examining its relation to age or some other ranked data, you should…

Accepted Answer

A)  use a Spearman correlation 
B)  use a Mann Whitney U test 
C)  use a Wilcoxon Signed-Rank test 
D)  use a Pearson correlation 
A)  use a Spearman correlation 
B)  use a Mann Whitney U test 
C)  use a Wilcoxon Signed-Rank test 
D)  use a Pearson correlation

Question 13

How is a Mann-Whitney U test and a Wilcoxon Signed-Rank test different?

Accepted Answer

A)  the Mann Whitney U test is used on matched data and the Wilcoxon Signed-Rank test is not. 
B)  The Mann-Whitney U test is a parametric procedure, and the Wilcoxon Signed-Rank test is a nonparametric procedure. 
C)  The Mann-Whitney U test is used on 3 or more groups, and the Wilcoxon Signed-Rank test is used to test for relationships 
D)  The Mann-Whitney U test is used for two independent groups and the Wilcoxon Signed-Rank test is used for paired or matched data. 
A)  the Mann Whitney U test is used on matched data and the Wilcoxon Signed-Rank test is not. 
B)  The Mann-Whitney U test is a parametric procedure, and the Wilcoxon Signed-Rank test is a nonparametric procedure. 
C)  The Mann-Whitney U test is used on 3 or more groups, and the Wilcoxon Signed-Rank test is used to test for relationships 
D)  The Mann-Whitney U test is used for two independent groups and the Wilcoxon Signed-Rank test is used for paired or matched data.

Question 14

In 2017, Nintendo (a Japanese video game company) released a new console called the Nintendo Switch. Nintendo was interested to see how existing customers with their previous generation console (i.e., the Wii U) rate the new product. Below are data of individuals who rated the first console and now rated the Nintendo Switch. Nintendo decided that given the small sample and ranked data, they would use a Wilcoxon Ranked-Sign test.
 $\begin{array}{cc}
\hline\text { Wii U } & \text { Switch } \
\hline 7 & 8 \
5 & 9 \
6 & 7 \
4 & 2 \
8 & 6 \
9 & 10 \
2 & 9 \
4 & 8 \
7 & 9 \
7 & 8 \
\hline
\end{array}$ What is the critical value for this test, assuming two tails and $\alpha$ = .05?

Accepted Answer

The answer of In 2017, Nintendo (a Japanese video game...

Question 15

In a spearman correlation, how do you determine the strength of the correlation coefficient?

Accepted Answer

A)  Negative correlations are weaker than positive correlations 
B)  Correlations are weaker as they approach 0. 
C)  The strength of the correlation depends on the sample size. Smaller samples tend to be stronger 
D)  Correlations become stronger as they approach 0. 
A)  Negative correlations are weaker than positive correlations 
B)  Correlations are weaker as they approach 0. 
C)  The strength of the correlation depends on the sample size. Smaller samples tend to be stronger 
D)  Correlations become stronger as they approach 0.

Question 16

When using nonparametric analyses, you are generally dealing with __________ instead of ___________ and __________.

Accepted Answer

A)  rank; means; standard deviations 
B)  rank; medians; interquartile range 
C)  means; rank; range 
D)  rank; means; sample size 
A)  rank; means; standard deviations 
B)  rank; medians; interquartile range 
C)  means; rank; range 
D)  rank; means; sample size

Question 17

Non-parametric tests assume that the data are on a nominal scale

Accepted Answer

A) True 
 B)False

Question 18

In which of the following situations should a Wilcoxon signed-rank test be used?

Accepted Answer

A)  When matched data is normally distributed and ranked 
B)  When observations are non-independent and the data are skewed 
C)  When you wanted to use an independent samples t-test but the data ends up being heavily skewed. 
D)  When the sample size is very large and on a ratio scale. 
A)  When matched data is normally distributed and ranked 
B)  When observations are non-independent and the data are skewed 
C)  When you wanted to use an independent samples t-test but the data ends up being heavily skewed. 
D)  When the sample size is very large and on a ratio scale.

Question 19

skewed data is measured on a scale where 0 indicates very little to skew.

Accepted Answer

A) True 
 B)False

Question 20

Nonparametric tests do not produce a significance level. Instead, they generate effect sizes.

Accepted Answer

A) True 
 B)False

The data below that records the number of inches of snowfall in different parts of the country Score 22 24 26 47 52 36 44 26 35 59 21 What is the 7^th rank?

If you have 12 pairs of participants what is your critical value for a two-tailed Wilcoxon Signed-rank test at $\alpha$ = .01?

The Mann-Whitney U test is a nonparametric method that compares means between two groups

The Wilcoxon signed-rank test should be used in place of its parametric equivalent when the data is non-normal or on an ordinal scale

Which of the following is not an assumption of parametric tests?

Consider the following dataset on standardized test scores: 134, 145, 142, 145, 146, 152, 155, 155, 159. There are ___ ties and the score 152 is in the _ rank.

Which of the following characteristics would lead you to choose a non-parametric test over a parametric test?

Nonparametric tests do not necessarily test differences between means .

Data on an ordinal scale are generally analyzed by…

The Perception of Competitiveness Scale (PCS) developed by Carter and Weissbrod (2011) is a likert scale. If you assume that the scale is ordinal and are examining its relation to age or some other ranked data, you should…

How is a Mann-Whitney U test and a Wilcoxon Signed-Rank test different?

In a spearman correlation, how do you determine the strength of the correlation coefficient?

When using nonparametric analyses, you are generally dealing with ____ instead of _ and ______.

Non-parametric tests assume that the data are on a nominal scale

In which of the following situations should a Wilcoxon signed-rank test be used?

skewed data is measured on a scale where 0 indicates very little to skew.

Nonparametric tests do not produce a significance level. Instead, they generate effect sizes.

Introduction: Statistics--Who Needs Them

Types of Data

A Picture Is Worth a Thousand Words: Creating and Interpreting Graphics

Measures of Central Tendency: Whats so Average About the Mean

Variability: the Law of Life

Where Am I Normal Distributions and Standard Scores

Basic Probability Theory

The Central Limit Theorem and Hypothesis Testing

The Z-Test

The T-Test

Analysis of Variance

Confidence Intervals and Effect Size: Building a Better Mousetrap

Correlation and Regression: Are We Related

The Chi-Square Test

Which Test Should I Use and Why

Filters

Exam 15: Non-Parametric Tests

The data below that records the number of inches of snowfall in different parts of the country Score 22 24 26 47 52 36 44 26 35 59 21 What is the 7th rank?

If you have 12 pairs of participants what is your critical value for a two-tailed Wilcoxon Signed-rank test at α\alphaα = .01?

The Mann-Whitney U test is a nonparametric method that compares means between two groups

The Wilcoxon signed-rank test should be used in place of its parametric equivalent when the data is non-normal or on an ordinal scale

Which of the following is not an assumption of parametric tests?

Consider the following dataset on standardized test scores: 134, 145, 142, 145, 146, 152, 155, 155, 159. There are _______ ties and the score 152 is in the _____ rank.

Which of the following characteristics would lead you to choose a non-parametric test over a parametric test?

Nonparametric tests do not necessarily test differences between means .

Data on an ordinal scale are generally analyzed by…

The Perception of Competitiveness Scale (PCS) developed by Carter and Weissbrod (2011) is a likert scale. If you assume that the scale is ordinal and are examining its relation to age or some other ranked data, you should…

How is a Mann-Whitney U test and a Wilcoxon Signed-Rank test different?

In a spearman correlation, how do you determine the strength of the correlation coefficient?

When using nonparametric analyses, you are generally dealing with __________ instead of ___________ and __________.

Non-parametric tests assume that the data are on a nominal scale

In which of the following situations should a Wilcoxon signed-rank test be used?

skewed data is measured on a scale where 0 indicates very little to skew.

Nonparametric tests do not produce a significance level. Instead, they generate effect sizes.

Introduction: Statistics--Who Needs Them

Types of Data

A Picture Is Worth a Thousand Words: Creating and Interpreting Graphics

Measures of Central Tendency: Whats so Average About the Mean

Variability: the Law of Life

Where Am I Normal Distributions and Standard Scores

Basic Probability Theory

The Central Limit Theorem and Hypothesis Testing

The Z-Test

The T-Test

Analysis of Variance

Confidence Intervals and Effect Size: Building a Better Mousetrap

Correlation and Regression: Are We Related

The Chi-Square Test

Which Test Should I Use and Why

Filters

The data below that records the number of inches of snowfall in different parts of the country Score 22 24 26 47 52 36 44 26 35 59 21 What is the 7^th rank?

If you have 12 pairs of participants what is your critical value for a two-tailed Wilcoxon Signed-rank test at $\alpha$ = .01?

Consider the following dataset on standardized test scores: 134, 145, 142, 145, 146, 152, 155, 155, 159. There are ___ ties and the score 152 is in the _ rank.

When using nonparametric analyses, you are generally dealing with ____ instead of _ and ______.