Astudy reported in the may 17, 2012 issue of the new england journal of medicine followed people for an average of 13 years and found that people who consumed two or more cups of coffee a day were less likely to die during the course of the study than those who drank no coffee.
a. was this study a randomized experiment or an observational study?
b. based on this study, can it be concluded that drinking coffee causes people to live longer?

A study reported in the May 17, 2012 issue of The New England Journal of Medicine followed people for an average of 13 years and found that people who consumed two or more cups of coffee a day were less likely to die during the course of the study than those who drank no coffee.

Was this study a randomized experiment or an observational study?

The above study is randomized experiment

Based on this study, can it be concluded that drinking coffee causes people to live longer?

Yes, due to the inference from the research study above. it could be deduced that coffee enhances or improves life span than people without taking coffee as it was established during the 13 years of the research

Explanation:

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.

answer(d) the growth of consumption is likely to remain sluggish even as the economy begins to recover.;