Red meat and mortality . Many studies have found an association between red meat

Question

Red meat and mortality. Many studies have found an association between red meat consumption and an increased risk of chronic diseases. What is the relationship between red meat consumption and mortality? A large study followed 120,000 men and women who were free of coronary heart disease and cancer
at the beginning of the study. Participants were asked detailed questions about their eating habits every four years, and the study spanned almost 30 years. It was found that the risk of dying at an early age -- from heart disease, cancer, or any other cause, rises with the amount of red meat that they consumed

(a) Is this an observational study or an experiment?

(b) What are the explanatory and response variables?

The explanatory variable is:

The response variable is:

Explanation / Answer

A. In fields such as epidemiology, social sciences, psychology and statistics, anobservational study draws inferences from a sample to a population where the independent variable is not under the control of the researcher because of ethical concerns or logistical constraints.

This is observational study

B. An explanatory variable is a type of independentvariable.

Here independent variable is red meat consumption

C. Response variable is whether or not a subject dies

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