Exam 15: Chi-Squared Tests

Sales Volumes A telemarketer makes five calls per day.A sample of 200 days gives the frequencies of sales volumes listed below: Assume the population is binomial distribution with a probability of purchase p equal to .50. -{Sales Volumes Narrative} Should the assumption of a binomial distribution be rejected at the 5% significance level?

(Essay)

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Question 121

If you want to describe a population with more than two categories, you can use a chi-squared ____________________ test.

(Short Answer)

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Question 122

If the expected frequency of a cell is less than 5, you should combine cells of the table.

(True/False)

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Question 123

The number of ATVs sold by three salespersons over a 3-month period is shown below: Use the 5% level of significance and test for the independence of salesperson and type of product sold.

(Essay)

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Question 124

The number of degrees of freedom for a contingency table with 4 rows and 8 columns is

(Multiple Choice)

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Question 125

The number of degrees of freedom in a chi-squared test for normality, where the number of standardized intervals is 5 and there are 2 population parameters to be estimated from the data, is equal to:

(Multiple Choice)

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Question 126

When k = 2 the experiment is identical to the experiment.

(Short Answer)

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Question 127

If the expected frequency of a cell is less than 5, you should increase the significance level.

(True/False)

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Question 128

If the expected frequencies and the observed frequencies are quite different, you are likely to ____________________ the null hypothesis.

(Short Answer)

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Question 129

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} State the appropriate null and alternative hypotheses for this experiment.

(Essay)

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Question 130

The alternative hypothesis in a chi-squared test of a contingency table is that the two nominal variables are ____________________.

(Short Answer)

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Question 131

A chi-squared test of a contingency table with 4 rows and 5 columns shows that the value of the test statistic is 22.18.Using a chi-squared table, the most accurate statement that can be made is:

(Multiple Choice)

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Question 132

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 133

Contingency tables are used in:

(Multiple Choice)

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Question 134

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

(Multiple Choice)

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Question 135

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} Which test would be used to properly analyze the data in this experiment?

(Short Answer)

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Question 136

A large value of the chi-squared test statistic in a test of normality means you reject H₀ and conclude that the data ____________________ (do/do not) come from a normal distribution.

(Short Answer)

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Question 137

If you want to compare two populations that each have two categories, you can use a z-test for two proportions, or a chi-squared test of a(n) ____________________.

(Short Answer)

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Question 138

Which of the following tests is appropriate for nominal data if the problem objective is to describe a population with more than two categories?

(Multiple Choice)

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Question 139

To analyze the relationship between two nominal variables, use a(n) test of a(n) .

(Short Answer)

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Question 140

Showing 121 - 140 of 175

If you want to describe a population with more than two categories, you can use a chi-squared ____________________ test.

If the expected frequency of a cell is less than 5, you should combine cells of the table.

The number of ATVs sold by three salespersons over a 3-month period is shown below: Use the 5% level of significance and test for the independence of salesperson and type of product sold.

The number of degrees of freedom for a contingency table with 4 rows and 8 columns is

The number of degrees of freedom in a chi-squared test for normality, where the number of standardized intervals is 5 and there are 2 population parameters to be estimated from the data, is equal to:

When k = 2 the experiment is identical to the experiment.

If the expected frequency of a cell is less than 5, you should increase the significance level.

If the expected frequencies and the observed frequencies are quite different, you are likely to ____________________ the null hypothesis.

The alternative hypothesis in a chi-squared test of a contingency table is that the two nominal variables are ____________________.

A chi-squared test of a contingency table with 4 rows and 5 columns shows that the value of the test statistic is 22.18.Using a chi-squared table, the most accurate statement that can be made is:

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

Contingency tables are used in:

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

A large value of the chi-squared test statistic in a test of normality means you reject H₀ and conclude that the data ____________________ (do/do not) come from a normal distribution.

If you want to compare two populations that each have two categories, you can use a z-test for two proportions, or a chi-squared test of a(n) ____________________.

Which of the following tests is appropriate for nominal data if the problem objective is to describe a population with more than two categories?

To analyze the relationship between two nominal variables, use a(n) test of a(n) .

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

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

Filters

Exam 15: Chi-Squared Tests

If you want to describe a population with more than two categories, you can use a chi-squared ____________________ test.

If the expected frequency of a cell is less than 5, you should combine cells of the table.

The number of ATVs sold by three salespersons over a 3-month period is shown below: Use the 5% level of significance and test for the independence of salesperson and type of product sold.

The number of degrees of freedom for a contingency table with 4 rows and 8 columns is

The number of degrees of freedom in a chi-squared test for normality, where the number of standardized intervals is 5 and there are 2 population parameters to be estimated from the data, is equal to:

When k = 2 the ____________________ experiment is identical to the ____________________ experiment.

If the expected frequency of a cell is less than 5, you should increase the significance level.

If the expected frequencies and the observed frequencies are quite different, you are likely to ____________________ the null hypothesis.

The alternative hypothesis in a chi-squared test of a contingency table is that the two nominal variables are ____________________.

A chi-squared test of a contingency table with 4 rows and 5 columns shows that the value of the test statistic is 22.18.Using a chi-squared table, the most accurate statement that can be made is:

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

Contingency tables are used in:

A chi-squared test statistic in a test of a contingency table that is equal to zero means:

A large value of the chi-squared test statistic in a test of normality means you reject H0 and conclude that the data ____________________ (do/do not) come from a normal distribution.

If you want to compare two populations that each have two categories, you can use a z-test for two proportions, or a chi-squared test of a(n) ____________________.

Which of the following tests is appropriate for nominal data if the problem objective is to describe a population with more than two categories?

To analyze the relationship between two nominal variables, use a(n) ____________________ test of a(n) ____________________.

What Is Statistics

Graphical Descriptive Techniques I

Graphical Descriptive Techniques II

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

Filters

When k = 2 the experiment is identical to the experiment.

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

A large value of the chi-squared test statistic in a test of normality means you reject H₀ and conclude that the data ____________________ (do/do not) come from a normal distribution.

To analyze the relationship between two nominal variables, use a(n) test of a(n) .