Question 1

The Spearman rank correlation coefficient is calculated by first ranking the data values,and then calculating the Pearson correlation coefficient of the ranks.

Accepted Answer

A) True 
 B)False  True

Question 2

If both variables are ordinal,the value of the Spearman rank correlation coefficient is equal to the value of Pearson's correlation coefficient.

Accepted Answer

A) True 
 B)False  False

Question 3

The Spearman rank correlation coefficient is used to determine if a relationship exits between two variables when:

Accepted Answer

A)  one of the variables is ordinal. 
B)  both of the variables are ordinal. 
C)  both variables are interval and the normality requirement is not satisfied. 
D)  All of these choices are true. 
A)  one of the variables is ordinal. 
B)  both of the variables are ordinal. 
C)  both variables are interval and the normality requirement is not satisfied. 
D)  All of these choices are true. D

Question 4

Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B,in order to make a general assessment of relative fertilizer effectiveness,may well call for a:

Accepted Answer

A)  Friedman test. 
B)  Kruskal-Wallis test. 
C)  Wilcoxon rank-sum test. 
D)  Spearman rank correlation test. 
A)  Friedman test. 
B)  Kruskal-Wallis test. 
C)  Wilcoxon rank-sum test. 
D)  Spearman rank correlation test.

Question 5

The Spearman rank-correlation coefficient can only take on values between:

Accepted Answer

A)  -1 and +1 
B)  -$\infty$ and 0 
C)  0 and +$\infty$ 
D)  -$\infty$ and +1 
A)  -1 and +1 
B)  -$\infty$ and 0 
C)  0 and +$\infty$ 
D)  -$\infty$ and +1

Question 6

The Spearman rank correlation coefficient is equal to Pearson's correlation coefficient based on the ____________________ of the data.

Accepted Answer

The answer of The Spearman rank correlation coefficient is equal...

Question 7

Coffee
A supermarket chain has its own house brand of coffee.The general manager claims that their coffee is better than the coffee sold by a well-known Coffee Shop chain.To test the claim 40 individuals are randomly selected to participate in the following experiment.Each respondent is given the two brands of coffee to taste (without any identification)and asked to judge which one is better.Suppose that 25 people judge the Coffee Shop chain brand better,four say that the brands taste the same,and the rest claim that the supermarket brand is better.
-{Coffee Narrative} Which test is appropriate for this situation?

Accepted Answer

The answer of Coffee
A supermarket chain has its own house...

Question 8

If the test statistic Fr for the Friedman test is ____________________,we do not reject H0.

Accepted Answer

Question 9

When data are interval,but not normal,and you want to analyze matched pairs differences,use the ____________________ test.

Accepted Answer

Wilcoxon s

Question 10

The alternative hypothesis of the Friedman test is that ____________________ population locations differ.

Accepted Answer

at least t

Question 11

Suppose there is interest in comparing the locations of response times for three independent groups learning new specific task.The appropriate nonparametric procedure is the:

Accepted Answer

A)  Wilcoxon rank sum test. 
B)  Wilcoxon signed rank test. 
C)  Kruskal-Wallis test. 
D)  None of these choices. 
A)  Wilcoxon rank sum test. 
B)  Wilcoxon signed rank test. 
C)  Kruskal-Wallis test. 
D)  None of these choices.

Question 12

The normal approximation to the Wilcoxon signed rank sum test statistic is used whenever the sample size is large (more than 30).

Accepted Answer

A) True 
 B)False

Question 13

In all applications of the Kruskal-Wallis test,the alternative hypothesis to be tested is always stated as:

Accepted Answer

A)  the locations of all k populations are the same. 
B)  the locations of all k populations differ. 
C)  at least two population locations are the same. 
D)  at least two population locations differ. 
A)  the locations of all k populations are the same. 
B)  the locations of all k populations differ. 
C)  at least two population locations are the same. 
D)  at least two population locations differ.

Question 14

Statistical methods that require few assumptions,if any,about the population distribution are known as:

Accepted Answer

A)  parametric techniques. 
B)  nonparametric techniques. 
C)  free agent techniques. 
D)  All of these choices are true. 
A)  parametric techniques. 
B)  nonparametric techniques. 
C)  free agent techniques. 
D)  All of these choices are true.

Question 15

The Friedman test statistic is approximately chi-squared distributed with (k - 1)degrees of freedom,provided that either the number of blocks b or the number of treatments k is greater than or equal to 5.

Accepted Answer

A) True 
 B)False

Question 16

When n > 30 ____________________ has an approximate normal distribution.

Accepted Answer

The answer of When n > 30 ____________________ has an...

Question 17

Movie Scripts
In general,before a producer agrees to make a movie,each script is thoroughly reviewed by movie editors.Suppose that the Big-Screen Film Company has recently received two scripts for new movies.To help them decide which one to produce,both are sent to 30 editors who rate the scripts to judge which one is better.Suppose that 10 editors rate script 1 better and 20 rate script 2 better.
-{Movie Scripts Narrative} Explain how to use the p-value for testing the hypotheses at the 5% significance level.

Accepted Answer

Since p-va

Question 18

You are performing the Wilcoxon rank-sum test.The 13th through 15th values in an ordered array of pooled sample data all equal $180 (while the 12th value is less and the 16th value is more).The appropriate ranks for the three $180 values are:

Accepted Answer

A)  14,14,14 
B)  13,14,15 
C)  12.5,13,14.5 
D)  12.5,13,15 
A)  14,14,14 
B)  13,14,15 
C)  12.5,13,14.5 
D)  12.5,13,15

Question 19

The Friedman test is always:

Accepted Answer

A) one-tail with > in the alternative hypothesis. B) one-tail with < in the alternative hypothesis. C) two-tail D) None of these choices. A) one-tail with > in the alternative hypothesis. B) one-tail with < in the alternative hypothesis. C) two-tail D) None of these choices.

Question 20

The Kruskal-Wallis test compares the locations of ____________________ populations.

Accepted Answer

two or mor

Exam 19: Nonparametric Statistics

The Spearman rank correlation coefficient is calculated by first ranking the data values,and then calculating the Pearson correlation coefficient of the ranks.

If both variables are ordinal,the value of the Spearman rank correlation coefficient is equal to the value of Pearson's correlation coefficient.

The Spearman rank correlation coefficient is used to determine if a relationship exits between two variables when:

Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B,in order to make a general assessment of relative fertilizer effectiveness,may well call for a:

The Spearman rank-correlation coefficient can only take on values between:

The Spearman rank correlation coefficient is equal to Pearson's correlation coefficient based on the ____________________ of the data.

If the test statistic Fr for the Friedman test is ____________________,we do not reject H0.

When data are interval,but not normal,and you want to analyze matched pairs differences,use the ____________________ test.

The alternative hypothesis of the Friedman test is that ____________________ population locations differ.

Suppose there is interest in comparing the locations of response times for three independent groups learning new specific task.The appropriate nonparametric procedure is the:

The normal approximation to the Wilcoxon signed rank sum test statistic is used whenever the sample size is large (more than 30).

In all applications of the Kruskal-Wallis test,the alternative hypothesis to be tested is always stated as:

Statistical methods that require few assumptions,if any,about the population distribution are known as:

The Friedman test statistic is approximately chi-squared distributed with (k - 1)degrees of freedom,provided that either the number of blocks b or the number of treatments k is greater than or equal to 5.

When n > 30 ____________________ has an approximate normal distribution.

You are performing the Wilcoxon rank-sum test.The 13th through 15th values in an ordered array of pooled sample data all equal $180 (while the 12th value is less and the 16th value is more).The appropriate ranks for the three $180 values are:

The Friedman test is always:

The Kruskal-Wallis test compares the locations of ____________________ populations.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

A: Numerical Descriptive Techniques

B: Numerical Descriptive Techniques

C: Numerical Descriptive Techniques

Data Collection and Sampling

Probability

A: Random Variables and Discrete Probability Distributions

B: Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations

Analysis of Variance

Chi-Squared Tests

A: Simple Linear Regression and Correlation

B: Simple Linear Regression and Correlation

Multiple Regression

Model Building

Time-Series Analysis and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

If the test statistic F_r for the Friedman test is ____________________,we do not reject H₀.

You are performing the Wilcoxon rank-sum test.The 13^th through 15^th values in an ordered array of pooled sample data all equal $180 (while the 12^th value is less and the 16^th value is more).The appropriate ranks for the three $180 values are: