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According to USA Today (Dec 30, 1999), the average age of viewers of MSNBC cable television news
programming is 50 years old. A Canadian network executive thinks this might not be true in Canada, and
believes that the average age of these viewers i...
According to USA Today (Dec 30, 1999), the average age of viewers of MSNBC cable television news
programming is 50 years old. A Canadian network executive thinks this might not be true in Canada, and
believes that the average age of these viewers in Canada is significantly less than 50 years old.
To test her hypothesis, the Canadian executive obtains a list of Bell satellite subscribers who included
MSNBC in their channel package, and then conducts a phone poll of 2,000 of these subscribers across
Canada. Anyone called who reports not watching MSNBC news programming at least once a week is left
out of the survey; in the end 287 respondents watch MSNBC news programming at least weekly, and
report their ages as part of the survey.
What is the statistical population for this study?
A. All at-least-weekly Canadian viewers of MSNBC news programming who watch using Bell satellite.
B. Regular Canadian viewers of MSNBC news - answer✔A
According to USA Today (Dec 30, 1999), the average age of viewers of MSNBC cable television news
programming is 50 years old. A Canadian network executive thinks this might not be true in Canada, and
believes that the average age of these viewers in Canada is significantly less than 50 years old.
To test her hypothesis, the Canadian executive obtains a list of Bell satellite subscribers who included
MSNBC in their channel package, and then conducts a phone poll of 2,000 of these subscribers across
Canada. Anyone called who reports not watching MSNBC news programming at least once a week is left
out of the survey; in the end 287 respondents watch MSNBC news programming at least weekly, and
report their ages as part of the survey.
"Cola Wars" is the popular term for the intense competition between Coca-Cola and Pepsi. Their
campaigns have featured movie and television stars, rock videos, athletic endorsements, and claims of
consumer preference based on taste tests.
Suppose, as part of a Canadian Pepsi marketing campaign, Pepsi wants to show that cola drinkers
actually prefer Pepsi on taste alone. 1,000 cola consumers in Winnipeg Manitoba are given a blind taste
test (i.e., a taste test in which the two brand names are disguised as either Brand A or Brand B). Each
consumer is asked to state a preference from Brand A or Brand B, which the staff can then map back to
Pepsi or Coca-Cola. The taste test is done at a mall over 3 weekends, asking for volunteers as customers
enter a grocery store.
What issues might arise when trying to infer from this sample to the larger pool of all consumers?
A. Cola preference in Winnipeg may differ from the rest o - answer✔D
. You have been hired by the local municipal government to study the relationship between student
grades and hours of sleep in elementary school children. Your study design is to randomly select
classrooms in the district and interview 10 children from each classroom. For each child, you record
information about their age (years), amount of sleep per night (categories of low, average or high),
school grades (categories of letter grade) and their home address.
What is the sampling unit?
A. The school
B. The classroom
C. The district
D. The home address
E. The child - answer✔B
An ornithologist at Queen's University is studying the development time of recently hatched black-
capped chickadees on Wolfe Island. He randomly samples 20 nests from across the island and measures
the weight of each new hatchling in the nest. He repeats this sampling after 1 week, and then again
after 2 weeks.
What term best describes each chick included in this study?
A school superintendent is evaluating school cleanliness in preparation for a review of costodial staff
assignments and budget. She selects 7 random schools, and then emails a survey about school
cleanliness to 50 students in each school.
What term best describes each schools in this study design?
A. Sampling unit
B. Observation unit
C. Both sampling and observation unit
D. Measurement unit - answer✔D
A school superintendent is evaluating school cleanliness in preparation for a review of costodial staff
assignments and budget. She selects 7 random schools, and then emails a survey about school
cleanliness to 50 students in each school.
What term best describes each schools in this study design?
A. Sampling unit
B. Observation unit
C. Both sampling and observation unit
D. Measurement unit - answer✔A
You have been asked by a regional conservation authority to design a study to evaluate the risk that a
tick will bite someone walking at one of the parks. They provide you enough money to survey 15 parks
out of the 60 that are in the region. Your plan is to spend a day at each of the selected parks and survey
all the people leaving the park to assess whether a tick bit them or not. You will then calculate the
proportion of people bitten for each park sampled.
What is the statistical population?
A. A person
B. A park
C. The 60 parks in the region
D. All parks in Canada - answer✔C
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