We have the following sample data: .980, 1.01, .970, .990, 1.00, 1.00, .980, .970, .980, and .999. Run a sign test on H0: Md = 1.00 with a 2-sided alternative at α = .05. What do you conclude?

A) Reject the null hypothesis; p value = .0352. B) Do not reject the null hypothesis; p value = .004. C) Reject the null hypothesis; p value = .004. D) Do not reject the null hypothesis; p value = .0352. A) Reject the null hypothesis; p value = .0352. B) Do not reject the null hypothesis; p value = .004. C) Reject the null hypothesis; p value = .004. D) Do not reject the null hypothesis; p value = .0352.

Exam 18: Nonparametric Methods

Refer to the MegaStat/Excel output for the Wilcoxon rank sum test given in the table below. At a significance level of .05, which one of the following rejection point conditions is correct regarding the null hypothesis, H₀: D₁ and D₂ are identical probability distributions, and the alternative hypothesis of H_a: D₁ is shifted to the left of D₂

(Multiple Choice)

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Question 81

A cholesterol test was given to ten heart patients with high cholesterol levels. The same ten heart patients are then given a new cholesterol-reducing drug for six months. Before the patients begin taking the drug, they are told to maintain their current diets and eating habits so that the effect of the drug can be more effectively determined. After taking the drug for six months, the same patients are given a cholesterol test again. The cholesterol levels before and after taking the drug are given below. The cholesterol level readings are not normally distributed. At α = .05, test to determine if the drug is helpful in reducing cholesterol levels.

(Multiple Choice)

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Question 82

The Kruskal-Wallis test requires that all p samples being compared must have equal sample sizes.

(True/False)

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Question 83

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. What is the test statistic T?

(Multiple Choice)

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Question 84

We have the following sample data: .980, 1.01, .970, .990, 1.00, 1.00, .980, .970, .980, and .999. Run a sign test on H₀: M_d = 1.00 with a 2-sided alternative at α = .05. What do you conclude?

(Multiple Choice)

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Question 85

The Wilcoxon rank sum test is used to compare the locations of two ________ populations.

(Multiple Choice)

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Question 86

In order to perform the ________, all of the observations in p samples are combined into a single set and all of the values in the single set are ranked from smallest to largest. After ranking, the sum of the ranks for each of the p samples is calculated.

(Multiple Choice)

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Question 87

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. On average, can we conclude that the machines distribute the same amount? Test at α = .05.

(Multiple Choice)

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Question 88

The Wilcoxon rank sum test is the nonparametric counterpart of the

(Multiple Choice)

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Question 89

Which one of the following nonparametric methods can be used to determine the strength of the relationship between two variables?

(Multiple Choice)

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Question 90

Assume that the following data set is not normally distributed. (21, 18, 4, 9, 14, 16, 17, 12, 15, 8, 7, 5) If H_a: M_d ≠ 7, then the p value is

(Multiple Choice)

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Question 91

Which one of the following nonparametric methods can be used with a single population?

(Multiple Choice)

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Question 92

An owner of two cats is trying to decide if it is cheaper to order cat food over the Internet or to buy the food locally. Listed below are the prices (in dollars) quoted for two bags of cat food from various manufacturers. Calculate the value of T_I and T_E.

(Multiple Choice)

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Question 93

The EPA has stipulated that the Pollution Standard Index (PSI) for clean air standards is to average no more than 100. A random sample of 9 days for the city of Acme showed PSI readings of 144, 85, 90, 120, 150, 105, 93, 130, and 115.Assume the population of PSI readings is highly nonnormal. The EPA wants to determine if there is significant evidence to conclude that Acme air is dirtier than the stipulated clean air standards. The test is conducted at α = .05 and the p value is found to be .254. Based on this result, provide a one-sentence managerial conclusion.

(Multiple Choice)

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Question 94

The EPA has stipulated that the Pollution Standard Index (PSI) for clean air standards is to average no more than 100. A random sample of nine days for the city of Acorn showed PSI readings of 144, 85, 90, 120, 150, 105, 93, 130, and 115. Assume the population of PSI readings is highly nonnormal. The EPA wants to determine if there is significant evidence to conclude that Acorn's air is dirtier than the stipulated clean air standards. Which one of the following tests is appropriate for this problem?

(Multiple Choice)

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Question 95

Refer to the MegaStat/Excel output for the Wilcoxon signed ranks test given in the table below. At a significance level of .01, which one of the following rejection point conditions is correct regarding the null hypothesis, H₀: D₁ and D₂ are identical probability distributions, and the alternative hypothesis of H_a: D₁ is shifted to the left of D₂.

(Multiple Choice)

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Question 96

Wax-com Electronics Inc. claims that a certain circuit board has a median operating life of less than 20,000 hours. A random sample of 25 such circuit boards showed 8 circuit boards failing before 20,000 hours and 17 circuit boards failing after 20,000 hours. Assume the useful life of the circuit board is not normally distributed and state the null hypothesis.

(Multiple Choice)

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Question 97

The signed ranks test is the nonparametric counterpart of the

(Multiple Choice)

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Question 98

If the population from which we sample is highly skewed to the right or to the left, then the population ________ might be a better measure of central tendency than the population mean.

(Multiple Choice)

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Question 99

A cholesterol test was given to 10 heart patients with high cholesterol levels. The same 10 heart patients are then given a new cholesterol-reducing drug for six months. Before the patients begin taking the drug, they are told to maintain their current diets and eating habits so that the effect of the drug can be more effectively determined. After taking the drug for six months, the same patients are given a cholesterol test again. The pharmaceutical company that manufactures the drug wants to determine if the drug is helpful in reducing cholesterol levels. The cholesterol level readings are not normally distributed. State the alternative hypothesis for this problem.

(Multiple Choice)

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Question 100

Showing 81 - 100 of 103

The Kruskal-Wallis test requires that all p samples being compared must have equal sample sizes.

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. What is the test statistic T?

We have the following sample data: .980, 1.01, .970, .990, 1.00, 1.00, .980, .970, .980, and .999. Run a sign test on H₀: M_d = 1.00 with a 2-sided alternative at α = .05. What do you conclude?

The Wilcoxon rank sum test is used to compare the locations of two ________ populations.

In order to perform the ________, all of the observations in p samples are combined into a single set and all of the values in the single set are ranked from smallest to largest. After ranking, the sum of the ranks for each of the p samples is calculated.

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. On average, can we conclude that the machines distribute the same amount? Test at α = .05.

The Wilcoxon rank sum test is the nonparametric counterpart of the

Which one of the following nonparametric methods can be used to determine the strength of the relationship between two variables?

Assume that the following data set is not normally distributed. (21, 18, 4, 9, 14, 16, 17, 12, 15, 8, 7, 5) If H_a: M_d ≠ 7, then the p value is

Which one of the following nonparametric methods can be used with a single population?

An owner of two cats is trying to decide if it is cheaper to order cat food over the Internet or to buy the food locally. Listed below are the prices (in dollars) quoted for two bags of cat food from various manufacturers. Calculate the value of T_I and T_E.

The signed ranks test is the nonparametric counterpart of the

If the population from which we sample is highly skewed to the right or to the left, then the population ________ might be a better measure of central tendency than the population mean.

An Introduction to Business Statistics and Analytics

Descriptive Statistics and Analytics: Tabular and Graphical Methods

Descriptive Statistics and Analytics: Numerical Methods

Probability and Probability Models

Predictive Analytics I: Trees, K-Nearest Neighbors, Naive Bayes,

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Predictive Analytics Ii: Logistic Regression, Discriminate Analysis,

Time Series Forecasting and Index Numbers

Decision Theory

Filters

Exam 18: Nonparametric Methods

The Kruskal-Wallis test requires that all p samples being compared must have equal sample sizes.

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. What is the test statistic T?

We have the following sample data: .980, 1.01, .970, .990, 1.00, 1.00, .980, .970, .980, and .999. Run a sign test on H0: Md = 1.00 with a 2-sided alternative at α = .05. What do you conclude?

The Wilcoxon rank sum test is used to compare the locations of two ________ populations.

In order to perform the ________, all of the observations in p samples are combined into a single set and all of the values in the single set are ranked from smallest to largest. After ranking, the sum of the ranks for each of the p samples is calculated.

Two coffee-vending machines are studied to determine whether they distribute the same amounts. Samples are taken and the number of ounces is recorded for each machine. On average, can we conclude that the machines distribute the same amount? Test at α = .05.

The Wilcoxon rank sum test is the nonparametric counterpart of the

Which one of the following nonparametric methods can be used to determine the strength of the relationship between two variables?

Assume that the following data set is not normally distributed. (21, 18, 4, 9, 14, 16, 17, 12, 15, 8, 7, 5) If Ha: Md ≠ 7, then the p value is

Which one of the following nonparametric methods can be used with a single population?

An owner of two cats is trying to decide if it is cheaper to order cat food over the Internet or to buy the food locally. Listed below are the prices (in dollars) quoted for two bags of cat food from various manufacturers. Calculate the value of TI and TE.

The signed ranks test is the nonparametric counterpart of the

If the population from which we sample is highly skewed to the right or to the left, then the population ________ might be a better measure of central tendency than the population mean.

An Introduction to Business Statistics and Analytics

Descriptive Statistics and Analytics: Tabular and Graphical Methods

Descriptive Statistics and Analytics: Numerical Methods

Probability and Probability Models

Predictive Analytics I: Trees, K-Nearest Neighbors, Naive Bayes,

Discrete Random Variables

Continuous Random Variables

Sampling Distributions

Confidence Intervals

Hypothesis Testing

Statistical Inferences Based on Two Samples

Experimental Design and Analysis of Variance

Chi-Square Tests

Simple Linear Regression Analysis

Multiple Regression and Model Building

Predictive Analytics Ii: Logistic Regression, Discriminate Analysis,

Time Series Forecasting and Index Numbers

Decision Theory

Filters

We have the following sample data: .980, 1.01, .970, .990, 1.00, 1.00, .980, .970, .980, and .999. Run a sign test on H₀: M_d = 1.00 with a 2-sided alternative at α = .05. What do you conclude?

Assume that the following data set is not normally distributed. (21, 18, 4, 9, 14, 16, 17, 12, 15, 8, 7, 5) If H_a: M_d ≠ 7, then the p value is

An owner of two cats is trying to decide if it is cheaper to order cat food over the Internet or to buy the food locally. Listed below are the prices (in dollars) quoted for two bags of cat food from various manufacturers. Calculate the value of T_I and T_E.