Question 1

The Friedman test is a nonparametric equivalent to two-factor ANOVA without replication.

Accepted Answer

A) True 
 B)False  True

Question 2

Rejection of a hypothesis using a nonparametric test is less convincing than using an equivalent parametric test since nonparametric tests generally make fewer assumptions.

Accepted Answer

A) True 
 B)False  False

Question 3

The Wilcoxon rank sum test (Mann-Whitney test)can be used as a test for equality of two population medians.

Accepted Answer

A) True 
 B)False  True

Question 4

The Wilcoxon signed-rank test is useful to compare one sample median with a benchmark.

Accepted Answer

A) True 
 B)False

Question 5

Which nonparametric test is analogous to a parametric one-sample t-test for differences in paired data?

Accepted Answer

A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test 
A)  Wald-Wolfowitz one-sample runs test 
B)  Wilcoxon signed-rank test 
C)  Wilcoxon rank sum (Mann-Whitney)test 
D)  Kruskal-Wallis test

Question 6

Rejection of a hypothesis using a nonparametric test is more convincing than using an equivalent parametric test when the data are badly skewed.

Accepted Answer

A) True 
 B)False

Question 7

The Friedman test is often almost as powerful as two-factor ANOVA without replication (randomized block design).

Accepted Answer

A) True 
 B)False

Question 8

The dean of Oxnard business school wants to know if there is a difference in computer skills in four majors (marketing,finance,operations,accounting).A 20-question skills test is given to 10 randomly chosen students in each major.Which nonparametric test could be used by the dean to see if there is a difference in computer skills of students in the various majors?

Accepted Answer

A)  Wald-Wolfowitz test 
B)  Wilcoxon signed-rank test 
C)  Mann-Whitney test 
D)  Kruskal-Wallis test 
A)  Wald-Wolfowitz test 
B)  Wilcoxon signed-rank test 
C)  Mann-Whitney test 
D)  Kruskal-Wallis test

Question 9

Which is not a characteristic of the Kruskal-Wallis test?

Accepted Answer

A)  It is analogous to the parametric one-factor ANOVA. 
B)  It does not make any assumptions about the populations. 
C)  It is useful in comparing the medians in c groups. 
D)  It does not require normal distributions of populations. 
A)  It is analogous to the parametric one-factor ANOVA. 
B)  It does not make any assumptions about the populations. 
C)  It is useful in comparing the medians in c groups. 
D)  It does not require normal distributions of populations.

Question 10

The Friedman test is a nonparametric equivalent to a parametric one-sample t-test comparing a mean with a benchmark.

Accepted Answer

A) True 
 B)False

Question 11

The one-sample runs test is similar to a test for autocorrelation.

Accepted Answer

A) True 
 B)False

Question 12

The Wilcoxon signed-rank test is an alternative to the one-sample t-test for paired observations.

Accepted Answer

A) True 
 B)False

Question 13

Most nonparametric tests assume ordinal data.

Accepted Answer

A) True 
 B)False

Question 14

Nonparametric tests can often be used in small samples.

Accepted Answer

A) True 
 B)False

Question 15

The Mann-Whitney test is analogous to a one-sample t-test comparing a mean with a benchmark.

Accepted Answer

A) True 
 B)False

Question 16

Returns on an investor's stock portfolio (n = 19 stocks)are compared for the same stock in each of two consecutive quarters.Since the returns are not normally distributed (normality test p-values were .005 and .126 respectively),a nonparametric test was chosen.The test results are shown below.   Which is the best conclusion?

Accepted Answer

A)  The returns are correlated neither at α = .05 nor at α = .01. 
B)  The returns are correlated at α = .05 but not at α = .01. 
C)  The returns are correlated at α = .01 but not at α = .05. 
D)  The returns are correlated both at α = .05 and at α = .01. 
A)  The returns are correlated neither at α = .05 nor at α = .01. 
B)  The returns are correlated at α = .05 but not at α = .01. 
C)  The returns are correlated at α = .01 but not at α = .05. 
D)  The returns are correlated both at α = .05 and at α = .01.

Question 17

Systolic blood pressure of randomly selected HMO patients was recorded on a particular Wednesday,with the results shown here:   The appropriate hypothesis test to compare the medians is:

Accepted Answer

A)  Wilcoxon test. 
B)  Kruskal-Wallis test. 
C)  Levene's test. 
D)  Friedman test. 
A)  Wilcoxon test. 
B)  Kruskal-Wallis test. 
C)  Levene's test. 
D)  Friedman test.

Question 18

Nonparametric tests generally are more powerful than parametric tests when normality cannot be assumed.

Accepted Answer

A) True 
 B)False

Question 19

Which is not a characteristic of the Wilcoxon rank sum (Mann-Whitney)test?

Accepted Answer

A)  It can be used as a test for equality of two population medians. 
B)  It is analogous to a one-sample t-test comparing a mean with a benchmark. 
C)  It requires independent samples from populations with equal variances. 
D)  It is similar to one-factor ANOVA when we have c independent samples. 
A)  It can be used as a test for equality of two population medians. 
B)  It is analogous to a one-sample t-test comparing a mean with a benchmark. 
C)  It requires independent samples from populations with equal variances. 
D)  It is similar to one-factor ANOVA when we have c independent samples.

Question 20

The Spearman rank correlation test compares medians of two paired data sets.

Accepted Answer

A) True 
 B)False

The Friedman test is a nonparametric equivalent to two-factor ANOVA without replication.

Rejection of a hypothesis using a nonparametric test is less convincing than using an equivalent parametric test since nonparametric tests generally make fewer assumptions.

The Wilcoxon rank sum test (Mann-Whitney test)can be used as a test for equality of two population medians.

The Wilcoxon signed-rank test is useful to compare one sample median with a benchmark.

Which nonparametric test is analogous to a parametric one-sample t-test for differences in paired data?

Rejection of a hypothesis using a nonparametric test is more convincing than using an equivalent parametric test when the data are badly skewed.

The Friedman test is often almost as powerful as two-factor ANOVA without replication (randomized block design).

Which is not a characteristic of the Kruskal-Wallis test?

The Friedman test is a nonparametric equivalent to a parametric one-sample t-test comparing a mean with a benchmark.

The one-sample runs test is similar to a test for autocorrelation.

The Wilcoxon signed-rank test is an alternative to the one-sample t-test for paired observations.

Most nonparametric tests assume ordinal data.

Nonparametric tests can often be used in small samples.

The Mann-Whitney test is analogous to a one-sample t-test comparing a mean with a benchmark.

Systolic blood pressure of randomly selected HMO patients was recorded on a particular Wednesday,with the results shown here: The appropriate hypothesis test to compare the medians is:

Nonparametric tests generally are more powerful than parametric tests when normality cannot be assumed.

Which is not a characteristic of the Wilcoxon rank sum (Mann-Whitney)test?

The Spearman rank correlation test compares medians of two paired data sets.

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Quality Management

Filters

Exam 16: Nonparametric Tests

The Friedman test is a nonparametric equivalent to two-factor ANOVA without replication.

Rejection of a hypothesis using a nonparametric test is less convincing than using an equivalent parametric test since nonparametric tests generally make fewer assumptions.

The Wilcoxon rank sum test (Mann-Whitney test)can be used as a test for equality of two population medians.

The Wilcoxon signed-rank test is useful to compare one sample median with a benchmark.

Which nonparametric test is analogous to a parametric one-sample t-test for differences in paired data?

Rejection of a hypothesis using a nonparametric test is more convincing than using an equivalent parametric test when the data are badly skewed.

The Friedman test is often almost as powerful as two-factor ANOVA without replication (randomized block design).

Which is not a characteristic of the Kruskal-Wallis test?

The Friedman test is a nonparametric equivalent to a parametric one-sample t-test comparing a mean with a benchmark.

The one-sample runs test is similar to a test for autocorrelation.

The Wilcoxon signed-rank test is an alternative to the one-sample t-test for paired observations.

Most nonparametric tests assume ordinal data.

Nonparametric tests can often be used in small samples.

The Mann-Whitney test is analogous to a one-sample t-test comparing a mean with a benchmark.

Systolic blood pressure of randomly selected HMO patients was recorded on a particular Wednesday,with the results shown here: The appropriate hypothesis test to compare the medians is:

Nonparametric tests generally are more powerful than parametric tests when normality cannot be assumed.

Which is not a characteristic of the Wilcoxon rank sum (Mann-Whitney)test?

The Spearman rank correlation test compares medians of two paired data sets.

Overview of Statistics

Data Collection

Describing Data Visually

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time-Series Analysis

Chi-Square Tests

Quality Management

Filters