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Basic Skills and Concepts

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Submitted By dredgein
Words 496
Pages 2
Basic Skills and Concepts
21-28

Determine which of the four levels of measurement (nominal, ordinal, interval, and ratio) is most appropriate.

21. Voltage measurements from the author’s home: Interval
22. Types of movies (drama, comedy, adventure, documentary): nominal
23. Critic ratings of movies on a scale from 0 stars to 4 stars: Ratio
24. Actual temperatures (in degrees Fahrenheit): Interval
25. Companies (Disney, MGM, Warner Brothers, universal, 20th Century Fox): Nominal
26. Measured amounts of greenhouse gases (in tons per year) emitted by cars: Interval
27. Years in which movies were released: Ordinal
28. Ranks of cars evaluated by Consumer’s Union: Ordinal

Collecting Sample Data:

9-20

Identify which of these types of sampling is used: random, systematic, convenience, stratified, or cluster.

9. Ergonomics: A student of the author collected measurements of arm lengths from her family member: Convenience
10. Testing Echinacea: A study of effectiveness of Echinacea involved upper respiratory tract infections. One group of infections was treated with Echinacea and another group was treated with placebos: Cluster
11. Exit Polls: On the day of the last presidential election, ABC News organized an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left the premises: Convenience
12. Sobriety checkpoint: The author was an observer at a Town of Poughkeepsie Police sobriety checkpoint at which every fifth driver was stopped and interviewed. Systematic
13. Wine Tasting: The author once observed professional wine tasters working at the Consumer’s Union testing facility in Yonkers New York. Assume that a taste test involves three different wines randomly selected from each of five different wineries: Cluster
14. Recidivism: The U.S. Department of Corrections collects data about returning prisoners by randomly selecting five federal prisons and surveying all of the prisoners in each of the prisons: Convenience
15. Quality Control in Manufacturing: The Federal-Mogul Company manufactures Champion brand spark plugs. The procedure from quality control is to test every 100th spark plug from the assembly line. Systematic
16. Credit Card Data: The author surveyed all of his students to obtain sample data consisting of the number of credit cards students possess. Convenience
17. Tax Audits: The author once experienced a tax audit by a representative from the New York State Department of Taxation and Finance, which claimed that the author was randomly selected as part of a statistical audit. Convenience
18. Curriculum Planning: In a study of college programs, 820 students are randomly selected from those majoring in communications, 1463 students are randomly selected from those majoring in business, and 760 students are randomly selected from those majoring in History. Cluster
19. Study of Health Plans: six different health plans were randomly selected and all of their member were surveyed about their satisfaction. Convenience
20. Gallup Poll: In a Gallup Poll, 1003 adults were called after their telephones numbers were randomly generated by a computer, and 20% of them said that they get news on the Internet every day. Convenience

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