According to the National Sleep Foundation, companies are encouraging their workers to take

"power naps" (Athens Daily News, Jan. 9,2000). In Exercise 7.27

(p. 371), you analyzed data collected by a major airline that recently began encouraging reservation agents to nap during their breaks. The number of complaints received about each of a sample of 10 reservation agents during the six months before naps were encouraged and during the six months after the policy change are reproduced on p. 398. Compare the distributions of number of complaints for the two time periods using the Wilcoxon signcd rank test. Use a = .05 to make the appropriate inference.