Applying the evaluation criteria:

Your research question is, "What are the social benefits and liabilities for the United States developing a national health insurance system?"

3. Which source would likely be more authoritative on your topic?

Correct. An article in a peer-reviewed journal is more likely to have been written by an expert and will have been evaluated by other experts before it is published.

4. Which source is more likely to be accurate?

1. Health statistics from a newsletter published by a grassroots organization opposed to a universal health insurance
   
   
2. Health statistics from the National Center for Health Statistics web site