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Exam 3: Surveys and Sampling

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Question 21

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The National Capital Commission recently performed a quality check on the length of fence posts being installed in a new park area. To do this, each of the 400 posts in inventory was numbered. Twenty numbers from 1 and 400 were randomly selected. These 20 poles were the ones selected for the study. This type of sampling is called

A) simple random.
B) convenience.
C) cluster.
D) stratified.
E) systematic.

F) A) and B)
G) B) and D)

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Question 22

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When a tax auditor randomly selects 20 accounts from all the accounts of a business to check for accuracy, she has selected

A) a sample from a population.
B) a census.
C) a convenience sample.
D) a biased sample.
E) a stratified sample.

F) C) and D)
G) A) and B)

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Question 23

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Which of the following is the parameter of interest in the ASW study?

In order to estimate a parameter (such as the mean) of a population you would need which of the following?

Consider the following to answer the question(s) below. A consumer research group is interested in how older drivers view hybrid cars. Specifically, they wish to assess the percentage of drivers in Canada 50 years of age or older who intend to purchase a hybrid in the next two years. Suppose that they selected a systematic sample from a list of CARP (Canadian 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 false?

Consider the following to answer the question(s) below: The option to buy extended warranties is commonplace with most electronics purchases. Does the type of purchase affect a consumer's willingness to pay extra for an extended warranty? Data for 420 consumers who purchased digital cameras and laptop computers from a leading electronics retailer are summarized in the table. -Suppose the administration decides to do the following. At a Starbucks located on campus, every tenth person who enters on a Monday morning is selected to be surveyed. Explain why this may be biased.

Consider the following to answer the question(s) below. KiPLEX manufactures plastic pipes. KiPLEX piping is a less expensive alternative to copper piping. BPLEX's marketing department wants to determine plumbers' satisfaction with KiPLEX piping. To do this, they plan to survey plumbers who purchase KiPLEX pipes on regular basis. -Suppose that there are five categories of plumbers (individuals, small local businesses, home renovation companies, condo renovation companies, and high rise construction companies) . The marketing specialists decide to randomly select 20 individuals from each category. This sampling method is called

One member of the management team at ASW 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?