Exam 16: Inference for Counts: Chi-Square Tests

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Consider the following to answer the question(s) below: A local cell phone provider wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers. -To conduct the independence test the correct degrees of freedom are

(Multiple Choice)

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Question 21

Consider the following to answer the question(s) below: An online book store wants to determine if there is an association between coupon redemption and gender. After a special coupon broadcast to its reward members, the following data on coupon redemption at checkout were collected. -What Chi-Square test is appropriate in this situation?

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Question 22

Consider the following to answer the question(s) below: An online book store wants to determine if there is an association between coupon redemption and gender. After a special coupon broadcast to its reward members, the following data on coupon redemption at checkout were collected. -The degrees of freedom associated with the test statistic is

(Multiple Choice)

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Question 23

Consider the following to answer the question(s) below: We want to test whether type of car owned (domestic or foreign) is independent of gender. The following are the results of a random sample of 990 car owners. -At α = 0.05,

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Question 24

By examining residuals, determine which type of property had the most impact on the test results? What are the implications for the real estate agency?

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Question 25

Consider the following to answer the question(s) below: Vending machines on a college campus offer a variety of drinks. The purchasing agent believes that each type of drink is equally preferred by students and consequently orders equal quantities. The number of drinks sold from vending machines on this campus for the last six months is shown in the following table. -Given α = 0.05. Using the χ2 table from the Appendix B, we get the critical value of

(Multiple Choice)

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Question 26

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Consider the following to answer the question(s) below: A local cell phone provider wants to determine if the use of text messaging is independent of age. The following data has been collected from a random sample of customers. -To conduct the independence test the correct degrees of freedom are

Consider the following to answer the question(s) below: We want to test whether type of car owned (domestic or foreign) is independent of gender. The following are the results of a random sample of 990 car owners. -At α = 0.05,

By examining residuals, determine which type of property had the most impact on the test results? What are the implications for the real estate agency?

Data

Surveys and Sampling

Displaying and Describing Categorical Data

Displaying and Describing Quantitative Data

Scatterplots, Association, and Correlation

Introduction to Linear Regression

Randomness and Probability

Random Variables and Probability Distributions

Sampling Distributions

Confidence Intervals for Proportions

Testing Hypotheses About Proportions

Confidence Intervals and Hypothesis Tests for Means

Comparing Two Means

Design of Experiments and Analysis of Variance Anova

Nonparametric Methods

Inference for Regression

Understanding Regression Residuals

Multiple Regression

Building Multiple Regression Models

Time Series Analysis

Decision Making and Risk

Quality Control

Exploring and Collecting Data

Understanding Probability Distributions and Statistical Inference

Exploring Relationships Among Variables

Using Statistics for Decision Making

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