Dr. Hart is interested in the role of relationships in preventing heart disease.

Question

Dr. Hart is interested in the role of relationships in preventing heart disease. As her patients come into her office in Bluebell, Alabama, she asks them two questions: Are you in a relationship? Have you experienced any heart problems in the last 8 years? Based on her findings, she concludes that relationships cause cardiovascular (heart) problems. One issue with her methodology is that the results are not generalizable. What does this mean?

a. Her results may not be true for the entire population

b. She cannot prove causation

c. Her sample was not perfectly random

d. Her results were incorrect

a. Her results may not be true for the entire population

b. She cannot prove causation

Explanation / Answer

Ans a) Her results may not be true for the entire population

An experiment or research is externally valid only if the test results can be applied to the true state outside its own setting. Now when the results are not true for the entire population , the results are not considered to be generalizable.

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