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

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Description: An early study found (refer to image) An early study found that postal workers who worked in the office had higher rates ofcoronary heart disease than those who delivered mail on foot. The investigators concludedthat physical activity is inversely re

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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