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Unformatted text preview: BUS/ST 350 Sp '08 Reiland Exam 2 Practice Problems Exam date: Friday, March 14. Material covered on test: Lecture Unit 3, Lecture Unit 4 through middle p. 18. webassign homework : 4, 5, 6, 7. lecture worksheets : 9 - 16. WARNING! These practice problems may not cover all topics for which you are responsible on exam 2. Questions 1, 2, and 3 refer to the following: A marketing research firm wishes to determine if the adult men in Laramie, Wyoming would be interested in a new upscale men's clothing store. From a list of all residential addresses in Laramie, the firm selects a simple random sample of 100 and mails a brief questionnaire to each. 1. In the above survey, what is the sample? a. all adult men in Laramie, Wyoming b. all residential addresses in Laramie, Wyoming c. the members of the marketing firm that actually conducted the survey d. the adult men at the 100 addresses the survey was mailed to 2. In the above survey, what is the population of interest? a. all adult men in Laramie, Wyoming b. all residential addresses in Laramie, Wyoming c. the members of the marketing firm that actually conducted the survey d. the 100 addresses the survey was mailed to 3. In the above survey, what is the chance that all 100 homes in a particular neighborhood in Laramie end up being the sample of residential addresses selected? a. the same as for any other set of 100 residential addresses b. exactly 0 since random samples will spread out the addresses selected c. reasonably large due to the cluster effect d. 100 divided by the size of the population of Laramie 4. Which of the following is a potential source of bias in a survey? not a. undercoverage b. nonresponse c. the use of convenience sampling d. the use of simple random sampling 5. The January 2005 Gallup Youth Survey telephoned a random sample of 1,028 U.S. teens aged 13-17 and asked these teens to name their favorite movie from 2004. ( Napoleon Dynamite vote for Pedro! he has skills! ) had the highest percentage with 8% of teens ranking it as their favorite movie. Which of the following statements are true? I. The population of interest is U.S. teens aged 13-17. II. 8% is a statistic and not the actual percentage of all U.s. teens who would rank this movie as their favorite. III. This sampling design should provide a reasonably accurate estimate of the actual percentage of all U. S. teens who would rank this movie as their favorite. a. I only b. II only c. III only d. I and II e. I, II, and III BUS/ST 350 Sp '08 Practice Problems Exam 2 page 2 6. Suppose your local school district decides to randomly test high school students for attention deficit disorder (ADD). There are three high schools in the district, each with grades 9-12. The school board pools all of the students together and randomly samples 250 students. Is this sample a simple random sample?...
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This note was uploaded on 04/21/2009 for the course BUS 350 taught by Professor Reiland during the Spring '08 term at N.C. State.
- Spring '08