An early study found that postal workers who worked in the office had higher rates of coronary heart disease than those who delivered mail on foot. The investigators concluded that physical activity is inversely related to risk of developing coronary heart disease. Sceptics disagreed, pointing out that the postal clerks were older than the postal carriers, and that is a risk factor for coronary heart disease. This argument highlights the possible age role of: a) Chance b) Selection bias c) Recall bias d) Confounding
An early study found that postal workers who worked in the office had higher rates of coronary heart disease than those who delivered mail on foot. The investigators concluded that physical activity is inversely related to risk of developing coronary heart disease. Sceptics disagreed, pointing out that the postal clerks were older than the postal carriers, and that is a risk factor for coronary heart disease. This argument highlights the possible age role of: a) Chance b) Selection bias c) Recall bias d) Confounding
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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An early study found (refer to image)
Transcribed Image Text:An early study found that postal workers who worked in the office had higher rates of
coronary heart disease than those who delivered mail on foot. The investigators concluded
that physical activity is inversely related to risk of developing coronary heart disease.
Sceptics disagreed, pointing out that the postal clerks were older than the postal carriers,
and that
is a risk factor for coronary heart disease. This argument highlights the possible
age
role of:
a) Chance
b) Selection bias
c) Recall bias
d) Confounding
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