Exam 15: Nonparametric Statistics

Which of the following conditions distinguishes a Kruskal-Wallis test from a Mann-Whitney test?

In the nonparametric counterpart to the independent groups t test,when samples sizes for one or both groups are smaller than 10,the ____________________ test should be used.

The nature of the relationship between the two variables for the Wilcoxon signed-rank test is addressed by inspection of the:

There are two major types of nonparametric counterparts to parametric test: _____ tests and _____ tests.

The strength of the relationship for Spearman correlation is indicated by the sign of the correlation coefficient and the nature of the relationship is indicated by the magnitude of the correlation coefficient.

The Friedman analysis of variance by ranks is typically used to analyze the relationship between two variables when:

The Kruskal-Wallis test is a nonparametric alternative to which parametric test?

The Wilcoxon signed-rank test is typically used to analyze the relationship between two variables when:

The nature of the relationship following a statistically significant _____can be analyzed using the Dunn procedure.

A nonparametric statistical test will typically be used when data are measured at the _____ or _____ level.

Two major types of nonparametric tests are

The nature of the relationship cannot be addressed in nonparametric tests.

The sum of the ranks for a given group,R_j,is known as the R statistic.

In a Kruskal-Wallis test,if the null hypothesis of no relationship between the independent variable and the dependent variable is true,we would expect the mean ranks for the three conditions to be different,within the constraints of sampling error.

Statistical tests that require assumptions about the distribution of scores in the populations from which the samples are selected are called parametric statistical tests.

A researcher is interested in the relationship between the walkability of various cities (defined as how easy it is for residents to walk places as opposed to driving)and obesity rates for residents of these cities.An index is created to measure walkability which can range from 1-7,and 20 major cities in the United States are measured.For each city obesity rates per 1000 people were obtained.Data are in the table below,as well as the rankings for each variable,and difference scores. SD² = 2350 a.Calculate the Spearman correlation coefficient for the above data set. b.What are the degrees of freedom for this example. c.Convert the Spearman correlation coefficient to a t score. d.Using a critical value of $\pm$ 2.101,describe the statistical conclusion regarding the null hypothesis,and describe the strength and nature of the relationship.

The Friedman analysis of variance by ranks is the nonparametric counterpart of the:

A researcher examined the relationship between gender and attitudes toward drinking alcohol.The researcher obtained the following data: What is the value for the Glass rank biserial correlation coefficient?

A weakness of many nonparametric statistical tests is their lack of sensitivity to outliers.

Which of the following is NOT one of the conditions for use of the Kruskal-Wallis test?