Exam 18: Nonparametric Methods

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. Calculate the values of T_A and T_B.

(Multiple Choice)

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Question 41

An e-business/e-commerce information technology consulting company wants to compare the effectiveness of three programming languages that its programmers use. Currently each programming language is used by approximately 1/3 of the programmers employed by the company. The director of the programming division randomly selected five programmers from the users of each of the three programming languages and assigned the same simple programming task to each programmer. It is known that all three populations have highly skewed distributions with extreme outliers. Which one of the following nonparametric tests is appropriate for this problem?

(Multiple Choice)

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Question 42

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 43

Two NFL scouts are in the process of recruiting seven college senior football players receivers. After a careful review and evaluation, both scouts ranked the seven receivers in terms of their professional career prospects. If we want to determine whether the two scouts have similar opinions about the professional football career prospects of the seven players, state the null hypothesis.

(Multiple Choice)

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Question 44

In testing the significance of a population correlation coefficient using the Spearman's rank correlation coefficient, it is assumed that all possible combinations of values of variable X and variable Y have a bivariate normal probability distribution.

(True/False)

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Question 45

In a Wilcoxon rank sum test, when two or more observations are equal, we assign to each tied observation a rank equal to the ________ of the consecutive ranks.

(Multiple Choice)

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Question 46

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 < 16, then the p value is

(Multiple Choice)

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Question 47

The Wilcoxon signed ranks test is the nonparametric counterpart of the

(Multiple Choice)

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Question 48

An e-business/e-commerce information technology consulting company wants to compare the effectiveness of three programming languages that its programmers use. Currently each programming language is used by approximately 1/3 of the programmers employed by the company. The director of the programming division randomly selected five programmers from the users of each of the three programming languages and assigned the same simple programming task to each programmer. It is known that all three populations have highly skewed distributions with extreme outliers. Calculate the value of T_i (rank sum) for Program B.

(Multiple Choice)

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Question 49

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Set up the null hypothesis for the claim that the coaching is effective in increasing scores.

(Multiple Choice)

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Question 50

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. State the null hypothesis to test the claim. Assume that the population of all battery lives is not normally distributed.

(Multiple Choice)

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Question 51

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. Using α = .05, can we conclude that the battery life is more than 40 hours?

(Multiple Choice)

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Question 52

An assumption of the Wilcoxon rank sum test is that the variances of the two populations are equal.

(True/False)

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Question 53

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. At α = .05, test to determine if the coaching increases test scores.

(Multiple Choice)

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Question 54

Nonparametric tests can be more powerful than the corresponding t or F tests if the population distribution is highly skewed or nonnormal.

(True/False)

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Question 55

When a large sample is taken, the ________ approximation to the binomial distribution can be used to implement the sign test.

(Multiple Choice)

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Question 56

For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons). Test H₀: p_s = 0 vs. H_A: p_s > 0 for the relationship between beer consumption and wine consumption at the state level at α = .05.

(Multiple Choice)

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Question 57

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Calculate T⁻ and T⁺.

(Multiple Choice)

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Question 58

The Wilcoxon signed ranks test is a nonparametric test.

(True/False)

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Question 59

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. What is the rejection point T₀ for α = .05?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 103

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. Calculate the values of T_A and T_B.

In testing the significance of a population correlation coefficient using the Spearman's rank correlation coefficient, it is assumed that all possible combinations of values of variable X and variable Y have a bivariate normal probability distribution.

In a Wilcoxon rank sum test, when two or more observations are equal, we assign to each tied observation a rank equal to the ________ of the consecutive ranks.

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 < 16, then the p value is

The Wilcoxon signed ranks test is the nonparametric counterpart of the

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Set up the null hypothesis for the claim that the coaching is effective in increasing scores.

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. Using α = .05, can we conclude that the battery life is more than 40 hours?

An assumption of the Wilcoxon rank sum test is that the variances of the two populations are equal.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. At α = .05, test to determine if the coaching increases test scores.

Nonparametric tests can be more powerful than the corresponding t or F tests if the population distribution is highly skewed or nonnormal.

When a large sample is taken, the ________ approximation to the binomial distribution can be used to implement the sign test.

For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons). Test H₀: p_s = 0 vs. H_A: p_s > 0 for the relationship between beer consumption and wine consumption at the state level at α = .05.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Calculate T⁻ and T⁺.

The Wilcoxon signed ranks test is a nonparametric test.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. What is the rejection point T₀ for α = .05?

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

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. Calculate the values of TA and TB.

In testing the significance of a population correlation coefficient using the Spearman's rank correlation coefficient, it is assumed that all possible combinations of values of variable X and variable Y have a bivariate normal probability distribution.

In a Wilcoxon rank sum test, when two or more observations are equal, we assign to each tied observation a rank equal to the ________ of the consecutive ranks.

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 < 16, then the p value is

The Wilcoxon signed ranks test is the nonparametric counterpart of the

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Set up the null hypothesis for the claim that the coaching is effective in increasing scores.

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. Using α = .05, can we conclude that the battery life is more than 40 hours?

An assumption of the Wilcoxon rank sum test is that the variances of the two populations are equal.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. At α = .05, test to determine if the coaching increases test scores.

Nonparametric tests can be more powerful than the corresponding t or F tests if the population distribution is highly skewed or nonnormal.

When a large sample is taken, the ________ approximation to the binomial distribution can be used to implement the sign test.

For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons). Test H0: ps = 0 vs. HA: ps > 0 for the relationship between beer consumption and wine consumption at the state level at α = .05.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Calculate T− and T+.

The Wilcoxon signed ranks test is a nonparametric test.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. What is the rejection point T0 for α = .05?

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

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. Calculate the values of T_A and T_B.

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 < 16, then the p value is

For eight randomly selected states, the following table lists the per capita beer consumption (in gallons) and the per capita wine consumption (in gallons). Test H₀: p_s = 0 vs. H_A: p_s > 0 for the relationship between beer consumption and wine consumption at the state level at α = .05.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. Calculate T⁻ and T⁺.

A study was conducted to investigate the effect of coaching on IQ tests. Nine randomly selected students were tested. What is the rejection point T₀ for α = .05?