NEVER accept a statistic, data table, or chart without assessing its credibility!
ALWAYS evaluate how this information was derived by:
Statistics are very easy to manipulate or misinterpret due to the complex nature of gathering data. Asking the following questions will help you evaluate the quality of the data/statistics.
Find the Data Documentation (if available), usually in the form of a User Guide, Codebook, and/or Questionnaire to help you understand and evaluate the data.