Assignment:
Internal Strengths and Weaknesses of the article
• Are these unbiased estimates of the effects of the independent variables for the population that was sampled for the data in the article? Why or why not?
• Common sources of bias are omitted (confounding) variables, non-random sampling and poor measures.
• Sources
Readings:
How does electronic cigarette access affect adolescent smoking?
By Abigail S. Friedman