The authors of the paper "fudging the numbers: distributing chocolate influences student evaluations of an undergraduate course"† carried out a study to see if events unrelated to an undergraduate course could affect student evaluations. students enrolled in statistics courses taught by the same instructor participated in the study. all students attended the same lectures and one of six discussion sections that met once a week. at the end of the course, the researchers chose three of the discussion sections to be the "chocolate group." students in these three sections were offered chocolate prior to having them fill out course evaluations. students in the other three sections were not offered chocolate. the researchers concluded that "overall, students offered chocolate gave more positive evaluations than students not offered chocolate." indicate whether the study is an observational study or an experiment. give a brief explanation for your choice.

If morality represents the way we would like the world to work and economics represents how it actually does work, then the story of feldman’s bagel business lies at the very intersection of morality and economics. yes, a lot of people steal from him, but the vast majority, even though no is watching over them, do not. this outcome may surprise some people—including feldman’s economist friends, who counseled him twenty years ago that his honor-system scheme would never work. but it would not have surprised adam smith. in fact, theme of smith’s first book, the theory of moral sentiments, was the innate honesty of mankind. “how selfish soever man may be supposed,” smith wrote, “there are evidently some principles in his nature which interest him in the fortune of others, and render their happiness necessary to him, though he derives nothing from it, except the pleasure of seeing it.” which best describes the authors’ purpose in using a quotation from adam smith’s book the theory of moral sentiments? to highlight their knowledge of scottish philosophers to prove that people are inherently dishonest to demonstrate that incentive is the driving force behind cheating to lend credibility and additional support to their conclusion