Exam 18: Nonparametric Methods: Analysis of Ranked Data

Two movie reviewers gave their ratings (0 to 4 stars) to seven movies released this past month as follows: The Wilcoxon signed-rank test of difference is to be used. What is the critical value at the 5% level of significance?

(Short Answer)

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(29)

Question 41

A one-tailed sign test is used to test for differences between two populations at the 0.10 level of significance. There were 9 pluses and 5 minuses. What is the decision regarding the null hypothesis?

(Multiple Choice)

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Question 42

What is the difference between chi-square nonparametric tests and nonparametric tests based on ranks?

(Essay)

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Question 43

For small samples, the test statistic for the sign test is the z-statistic.

(True/False)

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Question 44

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the value of H? _______

(Short Answer)

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(29)

Question 45

The Kruskal-Wallis one-way analysis of variance by ranks is especially appropriate to test whether three or more population means are equal if the data is measured with an ordinal scale and/or the populations are not normal.

(True/False)

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Question 46

For nonparametric test based on ranking the data, if a majority of the ranks are based on ties, what is the likely outcome of a hypothesis test? Why?

(Essay)

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Question 47

The Wilcoxon rank-sum test computes a z test statistic.

(True/False)

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Question 48

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the sum of the ranks for Formula B? _______

(Short Answer)

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(33)

Question 49

A hypothesis test that rho is zero is conducted at the 5% level of significance. If Spearman's (rho) is 0.75 for a sample of 15 observations, what is the computed value of the t statistic?

(Multiple Choice)

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Question 50

In testing the significance of Spearman's rank-order coefficient, what is the null hypothesis? _______________

(Essay)

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Question 51

The following are the ratings (0 to 4) given by 12 individuals for two possible new flavors of soft drinks. Wilcoxon rank-sum is to be used. What is the z-test statistic?

(Multiple Choice)

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Question 52

The Sign test requires the populations to be _____________.

(Short Answer)

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Question 53

The Wilcoxon Rank-Sum method tests for equality between two _____________ populations.

(Short Answer)

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Question 54

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the sum of the ranks for Formula C? _______

(Short Answer)

4.8/5

(34)

Question 55

The sign test is one of a few tests that can test the value of the __________.

(Short Answer)

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Question 56

The _____________ of the differences between "before and after" measurements is evaluated in a Wilcoxon Signed-Rank test.

(Short Answer)

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Question 57

One difference between the Kruskal-Wallis method and one-way ANOVA is that the Kruskal-Wallace tests do not require the population ___________ to be the same.

(Short Answer)

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Question 58

In a market research study involving eleven people, seven preferred Product X, three preferred Product Y and one expressed no preference. A sign test is selected using the 0.05 level of significance. What is the null hypothesis?

(Short Answer)

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Question 59

In the Kruskal-Wallis test for the following data, what are the degrees of freedom?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 129

Two movie reviewers gave their ratings (0 to 4 stars) to seven movies released this past month as follows: The Wilcoxon signed-rank test of difference is to be used. What is the critical value at the 5% level of significance?

A one-tailed sign test is used to test for differences between two populations at the 0.10 level of significance. There were 9 pluses and 5 minuses. What is the decision regarding the null hypothesis?

What is the difference between chi-square nonparametric tests and nonparametric tests based on ranks?

For small samples, the test statistic for the sign test is the z-statistic.

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the value of H? _______

The Kruskal-Wallis one-way analysis of variance by ranks is especially appropriate to test whether three or more population means are equal if the data is measured with an ordinal scale and/or the populations are not normal.

For nonparametric test based on ranking the data, if a majority of the ranks are based on ties, what is the likely outcome of a hypothesis test? Why?

The Wilcoxon rank-sum test computes a z test statistic.

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the sum of the ranks for Formula B? _______

A hypothesis test that rho is zero is conducted at the 5% level of significance. If Spearman's (rho) is 0.75 for a sample of 15 observations, what is the computed value of the t statistic?

In testing the significance of Spearman's rank-order coefficient, what is the null hypothesis? _______________

The following are the ratings (0 to 4) given by 12 individuals for two possible new flavors of soft drinks. Wilcoxon rank-sum is to be used. What is the z-test statistic?

The Sign test requires the populations to be _____________.

The Wilcoxon Rank-Sum method tests for equality between two _____________ populations.

A soap manufacturer is experimenting with several formulas of soap powder. Three of the formulas were selected for further testing by a panel of homemakers. The ratings for the three formulas are as follows: What is the sum of the ranks for Formula C? _______

The sign test is one of a few tests that can test the value of the __________.

The _____________ of the differences between "before and after" measurements is evaluated in a Wilcoxon Signed-Rank test.

One difference between the Kruskal-Wallis method and one-way ANOVA is that the Kruskal-Wallace tests do not require the population ___________ to be the same.

In a market research study involving eleven people, seven preferred Product X, three preferred Product Y and one expressed no preference. A sign test is selected using the 0.05 level of significance. What is the null hypothesis?

In the Kruskal-Wallis test for the following data, what are the degrees of freedom?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Numerical Measures

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Statistical Process Control and Quality Management

An Introduction to Decision Theory

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