A Gallup poll indicated that 29% of Americans spent more money in recent months than they used to. But the majority (58%) still said they enjoy saving money more than spending it. (Data extracted from E. Mendes, "More Americans Say Their Spending Is Up," www.gallup.com, May 3, 2012.) The results are based on telephone interviews conducted April 9-12,2012, with a random sample of 1,016 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia.
a. Describe the population of interest.
b. Describe the sample that was collected.