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A psychologist is concerned about the health of veterans returning from war. She examines 33 veterans and finds that 15% show signs of post-traumatic stress

A psychologist is concerned about the health of veterans returning from war. She examines 33 veterans and finds that 15% show signs of post-traumatic stress disorder. Later research reveals the truth to be that 16% of veterans show signs of post-traumatic stress disorder. Is 15% a statistic or a parameter?

Statistic
Parameter
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