A market research group wants to find out which of two brands of shoes cal blisters more often. They are considering three methods of gathering data: Method A: Randomly choose 100 people. Ask them what shoes they typicall- and how often they tend to get blisters. Method B: Randomly choose 50 people to wear one brand of shoes and anot to wear the other brand. Compare the number of blisters that each group get the course of a month.
A market research group wants to find out which of two brands of shoes cal blisters more often. They are considering three methods of gathering data: Method A: Randomly choose 100 people. Ask them what shoes they typicall- and how often they tend to get blisters. Method B: Randomly choose 50 people to wear one brand of shoes and anot to wear the other brand. Compare the number of blisters that each group get the course of a month.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:A market research group wants to find out which of two brands of shoes causes
blisters more often. They are considering three methods of gathering data:
Method A: Randomly choose 100 people. Ask them what shoes they typically wear
and how often they tend to get blisters.
Method B: Randomly choose 50 people to wear one brand of shoes and another 50
to wear the other brand. Compare the number of blisters that each group gets over
the course of a month.
Method C: Find a group of 50 people that own the first brand of shoes, and another
50 people that own the second brand. Monitor how many blisters each group gets.
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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