Exam 17: Introduction to Nonparametric Statistics

The Wilcoxon Matched-Pairs Signed rank test is an alternative to the paired sample t-test when we are unwilling to assume that the populations are normally distributed.

(True/False)

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Question 21

Under what circumstances should the standard normal distribution be used when employing the Mann-Whitney U test?

(Multiple Choice)

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Question 22

A large sample Mann-Whitney U test should be used when the sample sizes exceed 20.

(True/False)

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Question 23

Consider the situation in which a study was recently conducted to determine whether the median price of houses is the same in Seattle and Phoenix.The following data were collected. Given these data,if a Mann-Whitney U test is to be used,the U statistic for Phoenix is:

(Multiple Choice)

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Question 24

The General Electric service department believes that the median time for a service call should be 30 or fewer minutes.To test this,the following random sample of service times was collected: Given that the managers do not wish to make the assumption that the population is normally distributed,the test statistic for the Wilcoxon signed rank sum test is:

(Multiple Choice)

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Question 25

Under what conditions should a decision maker use a nonparametric statistical procedure?

(Essay)

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Question 26

In a large sample test about a single population median,it is appropriate to employ the standard normal distribution so long as the population is also normally distributed.

(True/False)

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Question 27

The Mann-Whitney U test assumes that the 2 samples are:

(Multiple Choice)

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Question 28

Assume that you are conducting a Mann-Whitney U test and have found the following after ranking the data for the two groups: Then the U₁ statistic is 77.

(True/False)

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Question 29

In a Mann-Whitney U test,the test statistic will be equal to the sum of the ranks from sample one,or sample two,whichever is larger.

(True/False)

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Question 30

Recently,a study was done to determine whether the median speed on a section of highway is the same for cars versus trucks.A sample of 12 cars (n₁ = 12)and 15 trucks (n₂ = 15)was collected.If the Mann-Whitney U test is to be performed using an alpha = .05,the test critical U value is 49.

(True/False)

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Question 31

A recent study was conducted to determine if any of three suppliers of electronic components has a different median delivery time on special orders.To test this,five orders were given to each supplier and the delivery days were recorded.These data are shown as follows: If a Kruskal-Wallis test is to be performed,the sum of the rankings for Supplier 1 is 45.

(True/False)

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Question 32

The Mann-Whitney U test can be used to test whether two independent populations have the same median so long as the data are measured on at least an ordinal scale.

(True/False)

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Question 33

A claim was recently made that stated that the median income for male and female graduates is the same for those graduating with a degree in operations management.The following sample data were collected: In employing the Mann-Whitney U test,the U test statistic is 25.5.

(True/False)

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Question 34

A recent study was conducted to determine if any of three suppliers of electronic components has a different median delivery time on special orders.To test this,five orders were given to each supplier and the delivery days were recorded.These data are shown as follows: If a Kruskal-Wallis test is to be performed,the critical value for a test conducted using an alpha = .05 level is χ² = 11.0705.

(True/False)

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Question 35

In conducting a Mann-Whitney U test when the sample size is greater than 20,the U test statistic can be assumed normally distributed.

(True/False)

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Question 36

If a two-tailed Wilcoxon Matched-Pairs Signed Rank test is conducted for a sample of n = 8 and an alpha level equal to .05,the critical value is:

(Multiple Choice)

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Question 37

In conducting a Kruskal-Wallis one-way analysis of variance,the test statistic is assumed have approximately which distribution when the null hypothesis is true?

(Multiple Choice)

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Question 38

Recently,Major League Baseball officials stated that the median cost for a family of four to attend a baseball game including,parking,tickets,food,and drinks did not exceed $125.00.The following sample data were collected: Assuming that the test of the owners' claim is going to be conducted using an alpha = .05 level,the critical value is t = 1.9432.

(True/False)

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Question 39

Kruskal-Wallis One-Way Analysis of Variance is the nonparametric counterpart to the one-way ANOVA procedure in which the assumptions of normally distributed populations with equal variances are satisfied.

(True/False)

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Question 40

Showing 21 - 40 of 104

The Wilcoxon Matched-Pairs Signed rank test is an alternative to the paired sample t-test when we are unwilling to assume that the populations are normally distributed.

Under what circumstances should the standard normal distribution be used when employing the Mann-Whitney U test?

A large sample Mann-Whitney U test should be used when the sample sizes exceed 20.

Consider the situation in which a study was recently conducted to determine whether the median price of houses is the same in Seattle and Phoenix.The following data were collected. Given these data,if a Mann-Whitney U test is to be used,the U statistic for Phoenix is:

Under what conditions should a decision maker use a nonparametric statistical procedure?

In a large sample test about a single population median,it is appropriate to employ the standard normal distribution so long as the population is also normally distributed.

The Mann-Whitney U test assumes that the 2 samples are:

Assume that you are conducting a Mann-Whitney U test and have found the following after ranking the data for the two groups: Then the U₁ statistic is 77.

In a Mann-Whitney U test,the test statistic will be equal to the sum of the ranks from sample one,or sample two,whichever is larger.

Recently,a study was done to determine whether the median speed on a section of highway is the same for cars versus trucks.A sample of 12 cars (n₁ = 12)and 15 trucks (n₂ = 15)was collected.If the Mann-Whitney U test is to be performed using an alpha = .05,the test critical U value is 49.

The Mann-Whitney U test can be used to test whether two independent populations have the same median so long as the data are measured on at least an ordinal scale.

A claim was recently made that stated that the median income for male and female graduates is the same for those graduating with a degree in operations management.The following sample data were collected: In employing the Mann-Whitney U test,the U test statistic is 25.5.

In conducting a Mann-Whitney U test when the sample size is greater than 20,the U test statistic can be assumed normally distributed.

If a two-tailed Wilcoxon Matched-Pairs Signed Rank test is conducted for a sample of n = 8 and an alpha level equal to .05,the critical value is:

In conducting a Kruskal-Wallis one-way analysis of variance,the test statistic is assumed have approximately which distribution when the null hypothesis is true?

Kruskal-Wallis One-Way Analysis of Variance is the nonparametric counterpart to the one-way ANOVA procedure in which the assumptions of normally distributed populations with equal variances are satisfied.

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Describing Data Using Numerical Measures

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Introduction to Hypothesis Testing

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

Exam 17: Introduction to Nonparametric Statistics

The Wilcoxon Matched-Pairs Signed rank test is an alternative to the paired sample t-test when we are unwilling to assume that the populations are normally distributed.

Under what circumstances should the standard normal distribution be used when employing the Mann-Whitney U test?

A large sample Mann-Whitney U test should be used when the sample sizes exceed 20.

Consider the situation in which a study was recently conducted to determine whether the median price of houses is the same in Seattle and Phoenix.The following data were collected. Given these data,if a Mann-Whitney U test is to be used,the U statistic for Phoenix is:

Under what conditions should a decision maker use a nonparametric statistical procedure?

In a large sample test about a single population median,it is appropriate to employ the standard normal distribution so long as the population is also normally distributed.

The Mann-Whitney U test assumes that the 2 samples are:

Assume that you are conducting a Mann-Whitney U test and have found the following after ranking the data for the two groups: Then the U1 statistic is 77.

In a Mann-Whitney U test,the test statistic will be equal to the sum of the ranks from sample one,or sample two,whichever is larger.

Recently,a study was done to determine whether the median speed on a section of highway is the same for cars versus trucks.A sample of 12 cars (n1 = 12)and 15 trucks (n2 = 15)was collected.If the Mann-Whitney U test is to be performed using an alpha = .05,the test critical U value is 49.

The Mann-Whitney U test can be used to test whether two independent populations have the same median so long as the data are measured on at least an ordinal scale.

A claim was recently made that stated that the median income for male and female graduates is the same for those graduating with a degree in operations management.The following sample data were collected: In employing the Mann-Whitney U test,the U test statistic is 25.5.

In conducting a Mann-Whitney U test when the sample size is greater than 20,the U test statistic can be assumed normally distributed.

If a two-tailed Wilcoxon Matched-Pairs Signed Rank test is conducted for a sample of n = 8 and an alpha level equal to .05,the critical value is:

In conducting a Kruskal-Wallis one-way analysis of variance,the test statistic is assumed have approximately which distribution when the null hypothesis is true?

Kruskal-Wallis One-Way Analysis of Variance is the nonparametric counterpart to the one-way ANOVA procedure in which the assumptions of normally distributed populations with equal variances are satisfied.

The Where, why, and How of Data Collection

Graphs,charts and Tablesdescribing Your Data

Describing Data Using Numerical Measures

Using Probability and Probability Distributions

Discrete Probability Distributions

Introduction to Continuous Probability Distributions

Introduction to Sampling Distributions

Estimating Single Population Parameters

Introduction to Hypothesis Testing

Estimation and Hypothesis Testing for Two Population Parameters

Hypothesis Tests and Estimation for Population Variances

Analysis of Variance

Goodness-Of-Fit Tests and Contingency Analysis

Introduction to Linear Regression and Correlation Analysis

Multiple Regression Analysis and Model Building

Analyzing and Forecasting Time-Series Data

Introduction to Quality and Statistical Process Control

Introduction to Decision Analysis

Filters

Assume that you are conducting a Mann-Whitney U test and have found the following after ranking the data for the two groups: Then the U₁ statistic is 77.

Recently,a study was done to determine whether the median speed on a section of highway is the same for cars versus trucks.A sample of 12 cars (n₁ = 12)and 15 trucks (n₂ = 15)was collected.If the Mann-Whitney U test is to be performed using an alpha = .05,the test critical U value is 49.