FiltersDone

Question type

Essay

Multiple Choice

Short Answer

True False

Matching

Exam 16: Nonparametric Tests

Show Answer

Share

---

All types

Filters

Study FlashcardsPractice ExamLearn

Question 1

True/False

Review LaterAdd Note

Review Later

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

A) True
B) False

Correct Answer

verified

False

Question 2

True/False

Review LaterAdd Note

Review Later

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

A) True
B) False

Correct Answer

verified

True

Question 3

True/False

Review LaterAdd Note

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

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

Nonparametric tests can often be used in small samples.

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

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?

The Wilcoxon signed-rank test is useful to compare one sample median 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:

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

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

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

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

Most nonparametric tests assume ordinal data.

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

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

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?

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

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

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