Exam 8: Data Sources: Observational Studies and Surveys
Exam 1: Data and Decisions29 Questions
Exam 2: Visualizing and Describing Categorical Data30 Questions
Exam 3: Describing, Displaying, and Visualizing Quantitative Data16 Questions
Exam 4: Correlation and Linear Regression21 Questions
Exam 5: Randomness and Probability22 Questions
Exam 6: Random Variables and Probability Models20 Questions
Exam 7: The Normal and Other Continuous Distributions20 Questions
Exam 8: Data Sources: Observational Studies and Surveys23 Questions
Exam 9: Data Sources: Experiments12 Questions
Exam 10: Sampling Distributions and Confidence Intervals for Proportio18 Questions
Exam 11: Confidence Intervals for Means20 Questions
Exam 12: Testing Hypotheses21 Questions
Exam 13: More About Tests and Intervals16 Questions
Exam 14: Comparing Two Means13 Questions
Exam 15: Inference for Counts: Chi-Square Tests17 Questions
Exam 16: Inference for Regression19 Questions
Exam 17: Understanding Residuals19 Questions
Exam 18: Multiple Regression18 Questions
Exam 19: Building Multiple Regression Models16 Questions
Exam 20: Time Series Analysis18 Questions
Exam 21: Introduction to Data Mining11 Questions
Exam 22: Quality Control20 Questions
Exam 23: Nonparametric Methods13 Questions
Exam 24: Decision Making and Risk19 Questions
Exam 25: Analysis of Experiments and Observational Studies9 Questions
Exam 26: Statistics and Data Analysis207 Questions
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Management at a large multinational corporation would like to survey its employees about the level of interest in combining flexible work schedules with telecommuting from home.Which of the following is the parameter of interest in this study?
Free
(Multiple Choice)
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Correct Answer:
B
Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest, they plan to survey a random sample of their regular customers.Suppose that Molly's Reach has an alphabetized list of regular customers who belong to their rewards program.After randomly selecting a customer on the list, every 25th customer from that point on is chosen to be in the sample.This sampling plan is called ________________________ .
Free
(Multiple Choice)
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Correct Answer:
D
Shortly after the Sandy Hook Elementary School shooting in December 2012, a local television news program asked viewers to call in with their opinion about gun control.These results were likely biased because ________________________ .
Free
(Multiple Choice)
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Correct Answer:
D
The administration of a large university is interested in learning about the types of wellness programs that would interest its employees.Suppose that there are five categories of employees (administration, faculty, professional staff, clerical and maintenance) and the university decides to randomly select ten individuals from each category.This sampling plan is called ________________________ .
(Multiple Choice)
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If you open a new department store, reasons not to survey all of the area residents to understand their needs would not include ________________________ .
(Multiple Choice)
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The main ideas of sampling do not include ________________________ .
(Multiple Choice)
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Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest, they plan to survey a random sample of their regular customers.Suppose that Molly's Reach's regular customers belong to a rewards program and have a customer rewards ID number.Molly's Reach decides to randomly select 100 numbers.This sampling plan is called ________________________ .
(Multiple Choice)
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A researcher identified 100 men over forty who were not exercising and another 100 men over forty with similar medical histories who were exercising regularly.She followed all the men for several years to see if there was any difference between the two groups in the rate of heart attacks.This is a(n) ________________________ .
(Multiple Choice)
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Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest, they plan to survey a random sample of their regular customers.Which of the following is the parameter of interest in the Molly's Reach study?
(Multiple Choice)
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The HR department of a large company wants to determine how often to bring representatives from the financial firm managing employee pensions on site to meet with individuals about their retirement plans.In order to determine level of interest, they decide to survey employees.Suppose they select one department (e.g., Sales) and survey all employees within that department.This sampling plan is called ________________________ .
(Multiple Choice)
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From July to September, 2013, the Pew Research Center for the People & the Press carried out a national survey to determine use of social networking by African American internet users.It found that 73% used a social networking of some kind.This is a ________________________ .
(Multiple Choice)
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A consumer research group is interested in how older drivers view hybrid cars.Specifically, they wish to assess the percentage of drivers in the U.S.50 years of age or older who intend to purchase a hybrid in the next two years.They selected a systematic sample from a list of AARP (American Association of Retired Persons) members.Based on this sample, they estimated the percentage to be 17%.The sampling frame for this study is ________________________ .
(Multiple Choice)
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Management at a large multinational corporation would like to survey its employees about the level of interest in combining flexible work schedules with telecommuting from home.Each employee has an ID number, and the administration plans to randomly select 250 numbers.This sampling plan is called ________________________ .
(Multiple Choice)
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Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest, they plan to survey a random sample of their regular customers.All regular Molly's Reach customers is known as the ________ of the study.
(Multiple Choice)
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The HR department of a large company wants to determine how often to bring representatives from the financial firm managing employee pensions on site to meet with individuals about their retirement plans.In order to determine level of interest, they decide to survey employees.Suppose they group employees by age categories (e.g., under 30; 30 - under 45; 45 - under 60, 60 or older) and randomly select 50 individuals from each category.This sampling plan is called ________________________ .
(Multiple Choice)
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The online MBA director at a large business school surveys a sample of current students to determine their level of satisfaction with the program.She finds that 67% are "very satisfied" with the online program.This is a ________________________ .
(Multiple Choice)
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More dogs are being diagnosed with thyroid problems than have been diagnosed in the past.A researcher identified 50 puppies without thyroid problems and kept records of their diets for several years to see if any developed thyroid problems.This is a(n)________________________ .
(Multiple Choice)
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Management at a large multinational corporation would like to survey its employees about the level of interest in combining flexible work schedules with telecommuting from home.The HR Department has an alphabetized list of newly hired employees (hired within the last year).After starting the process by randomly selecting an employee from the list, then every 5th name is chosen to be included in the sample.This sampling plan is called ________________________ .
(Multiple Choice)
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Molly's Reach, a regional restaurant and gift shop, has recently launched an increased sales campaign, particularly focused on their gift shop.To determine if their proposal is of interest, they plan to survey a random sample of their regular customers.One member of the management team at Molly's Reach suggests that their survey could be conducted online.Customers logging on to the online store would be asked to take a few minutes to complete the survey and would be offered a coupon as incentive to participate.Which of the following statements is true?
(Multiple Choice)
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