Practice Quiz

Six Sigma Green Belt

Category - Black Belt

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The length of training offered to newly hired interns is strongly correlated with their monthly performance sales’ figures. With a correlation coefficient of +0.72, this does NOT imply that:
  1. training causes high sales’ figures
  2. training and sales are related in a positive manner
  3. training and sales may have a common contributing factor
  4. when training increases, sales increase
Explanation
Answer: A - This example does not imply that training causes high sales’ figures.

Key Takeaway: In correlational studies, it is understood that only the relationship between two variables is explored without assigning causation. In other words, length of training and sales’ figures may simply occur together or they may have a common contributing factor.
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