Exam 8: Surveys and Sampling
Exam 1: Data and Decisions41 Questions
Exam 2: Displaying and Describing Categorical Data45 Questions
Exam 3: Displaying and Describing Quantitative Data32 Questions
Exam 4: Correlation and Linear Regression84 Questions
Exam 5: Randomness and Probability34 Questions
Exam 6: Random Variables and Probability Models28 Questions
Exam 7: The Normal and Other Continuous Distributions31 Questions
Exam 8: Surveys and Sampling30 Questions
Exam 9: Sampling Distributions and Confidence Intervals for Proportions66 Questions
Exam 10: Testing Hypotheses About Proportions27 Questions
Exam 11: Confidence Intervals and Hypothesis Tests for Means28 Questions
Exam 12: Comparing Two Means35 Questions
Exam 13: Inference for Counts: Chi-Square Tests68 Questions
Exam 14: Inference for Regression38 Questions
Exam 15: Multiple Regression36 Questions
Exam 16: Introduction to Data Mining68 Questions
Select questions type
In the Molly's Reach study described above,
A. Define the target population.
b. Define the parameter.
c. What is the sampling frame?
d. How might the results be biased?
Free
(Essay)
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Correct Answer:
a. Define the target population.
All regular Molly's Reach customers.
b. Define the parameter.
of regular Molly's Reach customers who have concerns about online security.
c. What is the sampling frame?
Molly's Reach customers who belong to the rewards program.
d. How might the results be biased? Not all regular customers belong to the rewards program and Molly's Reach should also consider how others (potential customers) feel.
The main ideas of sampling do not include
Free
(Multiple Choice)
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Correct Answer:
C
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
Free
(Multiple Choice)
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Correct Answer:
B
One member of the management team at Molly's Reach wanted to know if customers
were concerned by recent security breaches. He 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.
Explain how this approach might be biased.
(Essay)
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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. Under consideration are several plans for selecting the sample. Name the sampling strategy for each.
a. Regular customers belong to a rewards program and have a customer rewards ID number. Randomly select 100 numbers.
b. Molly's Reach has stores in three different cities in northwestern U.S. and Canada. Randomly select one of the stores and survey all regular customers that belong to its rewards program.
c. 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.
d. Customers are grouped into four age categories (under 21, 21 to 35, 36 to 50, and over50). Randomly select 10 regular customers in each age category.
(Essay)
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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%. Which of the following
Statements about this study is true?
(Multiple Choice)
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The administration of a large university is interested in learning about the types of
wellness programs that would interest its employees. To do this, they plan to survey a
random sample of employees. Under consideration are several plans for selecting the
sample. Name the sampling strategy for each.
A. There are five categories of employees (administration, faculty, professional staff,
clerical and maintenance). Randomly select ten individuals from each category.
b. Each employee has an ID number. Randomly select 50 numbers.
c. Randomly select a school within the university (e.g., Business School) and survey all
of the individuals (administration, faculty, professional staff, clerical and maintenance)
who work in that school.
d. The HR Department has an alphabetized list of newly hired employees (hired within
the last five years). After starting the process by randomly selecting an employee from
the list, then every 5th name is chosen to be included in the sample.
(Essay)
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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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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
(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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The administration of a large university is interested in learning about the types of wellness programs that would interest its employees. Suppose that the university
Randomly selects a school (e.g., the Business School) and surveys all of the individuals
(administration, faculty, professional staff, clerical and maintenance) who work in that
School. This sampling plan is called
(Multiple Choice)
5.0/5
(39)
A women's advocacy group believes that there is gender discrimination in the financial services industry. One member of the group, a financial analyst, offers to
Survey a sample of women at her company about this issue. Which of the following
Statements is true about the proposed study?
(Multiple Choice)
4.8/5
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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)
4.8/5
(30)
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)
4.7/5
(44)
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)
4.8/5
(34)
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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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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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)
4.7/5
(29)
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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