Questions from Essentials of Statistics

Q: The Times Higher Education “World University Rankings” presents global university

The Times Higher Education “World University Rankings” presents global university performance tables to judge world class universities on the basis of teaching, research, knowledge transfer, and inter...

Q: The Quinnipiac University Poll conducts nationwide surveys as a public service and

The Quinnipiac University Poll conducts nationwide surveys as a public service and for research. This problem is based on the results of one such poll that asked independent random samples of American...

Q: Gallup conducted a national survey of 1008 American adults, asking “

Gallup conducted a national survey of 1008 American adults, asking “As you may know, as part of its efforts to investigate terrorism, a federal government agency obtained records from larger U.S. tele...

Q: Scoliosis is a condition involving curvature of the spine. In a

Scoliosis is a condition involving curvature of the spine. In a study by A. Nachemson and L. Peterson, reported in the Journal of Bone and Joint Surgery (Vol. 77, Issue 6, pp. 815–822), 286 girls aged...

Q: The Arizona Republic conducted a telephone poll of 758 Arizona adults who

The Arizona Republic conducted a telephone poll of 758 Arizona adults who celebrate Christmas. The question asked was, “In your family, do you open presents on Christmas Eve or Christmas Day?” Of thos...

Q: A poll conducted by Gallup asked American adults about vegetarianism. This

A poll conducted by Gallup asked American adults about vegetarianism. This problem is based on that poll. Of independent random samples of 500 men and 512 women, 20 of the men and 36 of the women said...

Q: In 2010, shortly before that year’s midterm elections, when Americans

In 2010, shortly before that year’s midterm elections, when Americans were dissatisfied with government and the Tea Party movement was emerging as a political force, 58% of American adults thought tha...

Q: P. Noakes et al. researched the effects of fatty acids

P. Noakes et al. researched the effects of fatty acids found in oily fish on lowering the risk of allergic disease in the article “Increased Intake of Oily Fish in Pregnancy: Effects on Neonatal Immun...

Q: In 2012, 15.9% of all U.S

In 2012, 15.9% of all U.S. families had incomes below the poverty level, as reported by the U.S. Census Bureau in American Community Survey. During that same year, of 400 randomly selected Wyoming fam...

Q: Labor Day was created by the U.S. labor movement

Labor Day was created by the U.S. labor movement over 100 years ago. It was subsequently adopted by most states as an official holiday. In a poll by Gallup, 1003 randomly selected adults were asked wh...