For each of the following settings, state appropriate hypotheses for preforming a significance test. Be sure to define the parameter of interest.
(a) As part of its 2010 census marketing campaign, the U.S. Census Bureau advertised “10 questions, 10 minutes—that’s all it takes.” On the census form itself, we read, “The U.S. Census Bureau estimates that, for the average household, this form will take about 10 minutes to complete, including the time for reviewing the instructions and answers” We suspect that the time it takes to complete the form may be longer than advertised.
(b) According to the website “sleep-deprivation.com, 85% of teens are getting too little sleep on school nights. Jamila wonders whether this result holds in her large high school. She asks an SRS of 100 students at the school how much sleep they get on a typical school night. In all, 75 of the students are getting less than the recommended amount of sleep.