Practice Quiz

Six Sigma Black Belt Exam Prep

Category - Black Belt

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According to a national grocery store chain manager, only 6% of consumers who have surveys mailed to their homes return them filled out completely. What is this type of sampling error called?
  1. non-response error
  2. non-return error
  3. lazy consumer error
  4. mailing error
Explanation
Answer: A - This type of sampling error is called the non-response error.

Key Takeaway: A non-response error occurs when the people who respond to a survey are different than those who do not respond. The information gained from such a survey risks being skewed and unrepresentative of the larger population. For example, if the 6% of consumers returning the surveys in this example are mostly elderly consumers, the manager may not gain much information from other types of consumers.
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