A researcher advertised for volunteers to study the relationship between the amount of meat consumed and cholesterol level. In response to this advertisement, 3476 persons volunteered. The researcher collected information on the meat consumption and cholesterol level of each of these persons. Based on these data, the researcher concluded that there is a very strong positive association between these two variables.
a. Is this an observational study or a designed experiment? Explain.
b. Based on this study, can the researcher conclude that consumption of meat increases cholesterol level? Explain why or why not.

  • CreatedAugust 25, 2015
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