A researcher is studying whether being a smoker causes people to get colds more often. Classify each method as a survey, an experiment, or an observational study. Then explain which method would be the most reliable.

Principles Of Marketing
17th Edition
ISBN:9780134492513
Author:Kotler, Philip, Armstrong, Gary (gary M.)
Publisher:Kotler, Philip, Armstrong, Gary (gary M.)
Chapter1: Marketing: Creating Customer Value And Engagement
Section: Chapter Questions
Problem 1.1DQ
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A researcher is studying whether being a smoker causes people to get colds more
often. Classify each method as a survey, an experiment, or an observational study.
Then explain which method would be the most reliable.
Method A: Choose people who already smoke and who do not and monitor how
many colds they get in a period of years.
Method B: Choose 100 people at random. Have 50 people smoke regularly for six
months and 50 people not smoke for six months. Then monitor how many of the 100
people get colds within the next six months.
Method C: Ask people who currently have a cold whether or not they smoke.
Tell whether each method of gathering data is a survey, an observational study, or an
experiment. Which option would give the most reliable results?
Transcribed Image Text:A researcher is studying whether being a smoker causes people to get colds more often. Classify each method as a survey, an experiment, or an observational study. Then explain which method would be the most reliable. Method A: Choose people who already smoke and who do not and monitor how many colds they get in a period of years. Method B: Choose 100 people at random. Have 50 people smoke regularly for six months and 50 people not smoke for six months. Then monitor how many of the 100 people get colds within the next six months. Method C: Ask people who currently have a cold whether or not they smoke. Tell whether each method of gathering data is a survey, an observational study, or an experiment. Which option would give the most reliable results?
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