According to the Bureau of Labor Statistics, the official unemployment rate was 15.5% among Blacks and 7.9% among Whites as of March 2011. During the recession of 2009–2011, the Black levels of unemployment have been similar or in many locations higher than those during the Great Depression era (www.bls.gov/news.release/empsit.t02.htm).
a. Identify the response variable and the explanatory variable.
b. Identify the two groups that are the categories of the explanatory variable.
c. The unemployment statistics are based on a sample of individuals. Were the samples of white individuals and black individual’s independent samples, or dependent samples? Explain.