A recent article found that Massachusetts residents spent an
average of $860.70 on the lottery in 2010, more than three times
the U.S. average (http://www.businessweek.com, March 14, 2012). A
researcher at a Boston think tank believes that Massachusetts
residents spend significantly less than this amount. He surveys 100
Massachusetts residents and asks them about their annual
expenditures on the lottery.
a. Specify the competing hypotheses to test the researcher’s
claim.
b. Specify the critical value(s) of the test at the...