Question: Job applicants sometimes alter their name and experience to appear more "white." In a 2016 study sociologists counted callbacks for fictitious resumes sent to randomly-selected job advertisements that differed only in the whitening of name and experience, like those shown here. Some of their data follow.

1. What parameter and populations did the sociologists Investigate?
2. Construct and interpret 95% confidence intervals for
   > the proportion of all whitened resumes that get a callback
   > the proportion of all unwhitened resumes that get a callback
   > the difference in proportions of whitened and unwhitened resumes that get a callback.
3. What conclusions can you draw?

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