SECTION 1.1 An Overview of Statistics 7 23. Ages of Adults in the United States Who Own Moter Vehicles Ages of adults in the U.S. who own two-wheeled motor vehicles Ages of adults in the U.S. who own motor vehicles with more than two wheels 24. Incomes of Adults in Nevada Incomes of adults in Nevada who own homes Incomes of adults in Nevada who do not own homes Using and Interpreting Concepts Identifying Data Sets In Exercises 25–34, identify the population and the sample. Describe the sample data set. 25. A survey of 1021 U.S. adults found that 45% have a favorable view of Cuba. (Source: Gallup) 26. A study of 227 U.S. infants was conducted to explore norms of the gut microbiomes of healthy infants. (Source: Scientific Reports) 27. A survey of 1500 U.S. adults found that 59% have never had a vaccine reaction. (Source: SingleCare) 28. A survey of 1028 U.S. adults found that 7% of respondents have never heard of organ and tissue donation. (Source: Research!America) 29. A survey of 2111 U.S. small business owners found that 54% oppose increasing the minimum wage. (Source: CNBC) 30. A survey of 214 of the seniors graduating with a bachelor of science degree from a university found that 15% planned to obtain entry-level jobs in the health field. 31. A survey of 1001 U.S. adults found that 47% of respondents typically feel well rested on weekdays. (Source: National Sleep Foundation) 32. A survey of 366 automobile owners who purchased extended warranties found that 44% never used the warranty. 33. To gather information about starting salaries at companies listed in the Standard & Poor’s 500, a researcher contacts 74 of the 500 companies. 34. In a survey of 679 members of a local children’s museum about parenting attitudes, 575 of the participants were female and 423 of the participants were parents of two or more children. (Source: University of California Press) Distinguishing Between a Parameter and a Statistic In Exercises 35–42, determine whether the number describes a population parameter or a sample statistic. Explain your reasoning. 35. The average salary for 24 of a hospital’s 82 registered nurses is $71,000. 36. A survey of 919 college board members found that 89% think that their institution is a good place for members of racial and ethnic minorities. (Source: Association of Governing Boards of Universities and Colleges) 37. Sixty-two of the 97 passengers aboard the Hindenburg airship survived its explosion.
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