Find an example of a randomized experiment in the news. Answer the following questions about it. Be sure to include the news article with your response.
a. What are the explanatory and response variables? What relationship was found, if any?
b. What treatments were assigned? Was a control group or placebo used?
c. Was the study a matched-pair design, a block design, or neither? Explain.
d. Was the study single-blind, double-blind, or neither? Explain.