The article “A ‘White’ Name Found to Help in Job Search” (Associated Press, January 15, 2003) described an experiment to investigate if it helps to have a “white- sounding” first name when looking for a job. Researchers sent resumes in response to 5,000 ads that appeared in the Boston Globe and Chicago Tribune. The resumes were identical except that 2,500 used “white- sounding” first names, such as Brett and Emily, whereas the other 2,500 used “black- sounding” names such as Tamika and Rasheed. The 5,000 job ads were assigned at random to either the white- sounding name group or the black- sounding name group. Resumes with white-sounding names received 250 responses while resumes with black sounding names received only 167 responses.
a. What are the two treatments in this experiment?
b. Use the data from this experiment to estimate the difference in response proportions for the two treatments.