Exam 15: Chi-Squared Tests

Mathematical statisticians have established that if we square the value of z,the test statistic for the test of one proportion p,we produce the χ² statistic.That is,z² = χ².

(True/False)

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Question 141

Which of the following is not a characteristic of a multinomial experiment?

(Multiple Choice)

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Question 142

If the observed frequencies are all smaller than the expected frequencies in a goodness-of-fit test,the chi-squared test statistic will be negative.

(True/False)

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Question 143

If you want to compare two populations that each have two categories,which test(s)can you use?

(Essay)

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Question 144

If you want to describe a population with more than two categories,which test(s)can you use?

(Essay)

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Question 145

To determine whether data were drawn from a multinomial distribution with certain proportions,you use a:

(Multiple Choice)

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Question 146

In a goodness-of-fit test,the null hypothesis states that the data came from a normally distributed population.The researcher estimated the population mean and population standard deviation from a sample of 300 observations.In addition,the researcher used 6 standardized intervals to test for normality.Using a 2.5% level of significance,the critical value for this test is 14.4494.

(True/False)

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Question 147

Which of the following tests is appropriate for nominal data if the problem objective is to compare two populations and the number of categories exceeds 2?

(Multiple Choice)

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Question 148

The chi-squared test of a contingency table is based upon:

(Multiple Choice)

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Question 149

To test for normality,the ____________________ hypothesis specifies probabilities of certain intervals within the normal distribution.

(Short Answer)

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Question 150

A company surveyed consumers' preference for its dessert and the scores are as follows: Use 0.05 level of significance and test using the p-value method to see if there is a preference among the three desserts,according to the data.

(Essay)

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Question 151

Seat Belts A study was conducted to determine whether the use of seat belts in vehicles depends on whether or not a child was present in the car.A sample of 1,000 people treated for injuries sustained from vehicle accidents was obtained,and each person was classified according to (1)child present (yes/no)and (2)seat belt usage (worn or not worn)during the accident.The data are shown in the table below. -{Seat Belts Narrative} At 5% level of significance,what is the critical value of the test statistic?

(Essay)

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Question 152

A multinomial experiment with two categories is identical to a binomial experiment.

(True/False)

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Question 153

If we square the value of z (the test statistic in the test of a proportion)we produce the ____________________ statistic.

(Short Answer)

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Question 154

In a goodness-of-fit test,the null hypothesis states that the data came from a normally distributed population.The researcher estimated the population mean and population standard deviation from a sample of 200 observations.In addition,the researcher used 5 standardized intervals to test for normality.Using a 10% level of significance,the critical value for this test is 4.60517.

(True/False)

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Question 155

The degrees of freedom for the test statistic in a test of a contingency table is (r − 1)(c − 1)where r is the number of rows in the table,and c is the number of columns.

(True/False)

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Question 156

A chi-squared test of a contingency table is applied to a contingency table with 4 rows and 4 columns for two qualitative variables.The degrees of freedom for this test must be 9.

(True/False)

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Question 157

If you reject H₀ in a test of a contingency table,you conclude that based on your data:

(Multiple Choice)

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Question 158

If we want to conduct a one-tail test of a population proportion,we can employ:

(Multiple Choice)

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Question 159

A large value of a chi-squared test statistic in a test of a contingency table leads you to conclude the two variables are ____________________.

(Short Answer)

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Question 160

Showing 141 - 160 of 179

Mathematical statisticians have established that if we square the value of z,the test statistic for the test of one proportion p,we produce the χ² statistic.That is,z² = χ².

Which of the following is not a characteristic of a multinomial experiment?

If the observed frequencies are all smaller than the expected frequencies in a goodness-of-fit test,the chi-squared test statistic will be negative.

If you want to compare two populations that each have two categories,which test(s)can you use?

If you want to describe a population with more than two categories,which test(s)can you use?

To determine whether data were drawn from a multinomial distribution with certain proportions,you use a:

Which of the following tests is appropriate for nominal data if the problem objective is to compare two populations and the number of categories exceeds 2?

The chi-squared test of a contingency table is based upon:

To test for normality,the ____________________ hypothesis specifies probabilities of certain intervals within the normal distribution.

A company surveyed consumers' preference for its dessert and the scores are as follows: Use 0.05 level of significance and test using the p-value method to see if there is a preference among the three desserts,according to the data.

A multinomial experiment with two categories is identical to a binomial experiment.

If we square the value of z (the test statistic in the test of a proportion)we produce the ____________________ statistic.

The degrees of freedom for the test statistic in a test of a contingency table is (r − 1)(c − 1)where r is the number of rows in the table,and c is the number of columns.

A chi-squared test of a contingency table is applied to a contingency table with 4 rows and 4 columns for two qualitative variables.The degrees of freedom for this test must be 9.

If you reject H₀ in a test of a contingency table,you conclude that based on your data:

If we want to conduct a one-tail test of a population proportion,we can employ:

A large value of a chi-squared test statistic in a test of a contingency table leads you to conclude the two variables are ____________________.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Exam 15: Chi-Squared Tests

Mathematical statisticians have established that if we square the value of z,the test statistic for the test of one proportion p,we produce the χ2 statistic.That is,z2 = χ2.

Which of the following is not a characteristic of a multinomial experiment?

If the observed frequencies are all smaller than the expected frequencies in a goodness-of-fit test,the chi-squared test statistic will be negative.

If you want to compare two populations that each have two categories,which test(s)can you use?

If you want to describe a population with more than two categories,which test(s)can you use?

To determine whether data were drawn from a multinomial distribution with certain proportions,you use a:

Which of the following tests is appropriate for nominal data if the problem objective is to compare two populations and the number of categories exceeds 2?

The chi-squared test of a contingency table is based upon:

To test for normality,the ____________________ hypothesis specifies probabilities of certain intervals within the normal distribution.

A company surveyed consumers' preference for its dessert and the scores are as follows: Use 0.05 level of significance and test using the p-value method to see if there is a preference among the three desserts,according to the data.

A multinomial experiment with two categories is identical to a binomial experiment.

If we square the value of z (the test statistic in the test of a proportion)we produce the ____________________ statistic.

The degrees of freedom for the test statistic in a test of a contingency table is (r − 1)(c − 1)where r is the number of rows in the table,and c is the number of columns.

A chi-squared test of a contingency table is applied to a contingency table with 4 rows and 4 columns for two qualitative variables.The degrees of freedom for this test must be 9.

If you reject H0 in a test of a contingency table,you conclude that based on your data:

If we want to conduct a one-tail test of a population proportion,we can employ:

A large value of a chi-squared test statistic in a test of a contingency table leads you to conclude the two variables are ____________________.

What Is Statistics

Graphical Descriptive Techniques 1

Graphical Descriptive Techniques 2

Numerical Descriptive Techniques

Data Collection and Sampling

Probability

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

Simple Linear Regression and Correlation

Multiple Regression

Model Building

Nonparametric Statistics

Time-Series Analytics and Forecasting

Statistical Process Control

Decision Analysis

Conclusion

Filters

Mathematical statisticians have established that if we square the value of z,the test statistic for the test of one proportion p,we produce the χ² statistic.That is,z² = χ².

If you reject H₀ in a test of a contingency table,you conclude that based on your data: