Questions from Essentials of Statistics

Q: Drug dealer motivation is traditionally attributed to greed or social pressures.

Drug dealer motivation is traditionally attributed to greed or social pressures. Researchers R. Highland and D. Dabney explore possible personality characteristics as a motivation in the article “Usin...

Q: In a national poll taken on August 7–11, 2013

In a national poll taken on August 7–11, 2013, by Gallup, Inc., 1039 adults who were employed full or part time were asked the following question: “If you won 10 million dollars in the lottery, would...

Q: Research by G. Visser and C. Barker in “A

Research by G. Visser and C. Barker in “A Geography of British Backpacker Tourists in South Africa” (Geography, Vol. 89, No. 3, pp. 226–239) reflected on the impact of British backpacker tourists visi...

Q: In the article “Food Allergy Advice May Be Peanuts” (

In the article “Food Allergy Advice May Be Peanuts” (Science News, Vol. 174, No. 12, pp. 8–9), N. Seppa reports that early exposure to peanuts seems to lessen the risk of nut allergy. Of 4000 Jewish c...

Q: An article appearing in an issue of the Arizona Republic reported on

An article appearing in an issue of the Arizona Republic reported on a study conducted by G. Duncan of the University of Michigan. According to the report, “Persistent poverty during the first 5 years...

Q: In an issue of Discover (Vol. 26, No.

In an issue of Discover (Vol. 26, No. 2, pp. 10–11), J. Netting described the research of E. Tibbetts of the University of Arizona in the article, “The Kind of Face Only a Wasp Could Trust.” Tibbetts...

Q: A researcher wants to estimate the average income of parents of college

A researcher wants to estimate the average income of parents of college students. To accomplish that, he surveys a sample of 250 students at Yale. Is this a representative sample? Explain your answer....

Q: From the FlightStats On-time Performance Report Summary, we found

From the FlightStats On-time Performance Report Summary, we found that, in July 2013, the top five North American airlines in terms of percentage of on-time arrivals were Hawaiian (H), Horizon (Z), Co...

Q: As part of ESPN’s SportsCenturyRetrospective, a panel chosen by ESPN ranked

As part of ESPN’s SportsCenturyRetrospective, a panel chosen by ESPN ranked the top 100 North American athletes of the twentieth century. For a class project, you are to obtain a simple random sample...

Q: TalkBack Live, a production of CNN, conducted on-line

TalkBack Live, a production of CNN, conducted on-line surveys on various issues. One survey, called a QuickVote, of 680 people asked “Would you vote for a third-party candidate?” Of the 680 people sur...