Ebook Business research method (8th edition): Part 2
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Ebook Business research method (8th edition): Part 2
CHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 n a complete census2.Describe the process of identifying a target population and selecting a sampling frame3.Compare random sampling and systematic (nonsampling) errors4.Identify the types of nonprobability sampling, including their advantages and disadvantages5.Summarize the advantages and disadvan Ebook Business research method (8th edition): Part 2 tages of the various types of probability samples6.Discuss how to choose an appropriate sample design, as well as challenges for Internet samplingChapEbook Business research method (8th edition): Part 2
ter Vignette: Changing Pocketbook Problems for Today's FamiliesIt is easy to ask people what they consider to lx- the most pressing financial problemsCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 y families today. When pressed about which financial problem is most important, some interesting trends occur. These trends could not have been captured if not for the work of large-scale sampling of populations.Each quarter, the Gallup Corporation develops a representative sample of approximately1, Ebook Business research method (8th edition): Part 2 000 U.S. adults, aged 18 and older, to capture public perceptions on a variety of relevanttopics. to include financial concerns of the family. Since tEbook Business research method (8th edition): Part 2
he sample is developed and obtained carefully, it serves as a representation of the population of adults in the U.S. who are 18 years or older. As a rCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 with a sampling error of less than 3 percent. Using telephone based interviews, the Gallup Corporation asks the respondent to describe 'the most important financial problem facing your family today.’ Responses are open-ended, and are then coded based upon the theme of the response.Interestingly, tre Ebook Business research method (8th edition): Part 2 nds suggest that the most important financial problem facing families can often change over time, and may be reflective of the respondent's current awEbook Business research method (8th edition): Part 2
areness of the financial challenges of the day. For example, when energy and gas prices were at their highest during the summer of 2008.almost one-thiCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 nuary 2009), energy and gas prices were mentioned by only 3 percent. While health care costs was mentioned by 19 percent of families In October 2007. only 9 mentioned health care a year later.The implication of these types of changing trends suggest that financial problems facing families evolve ove Ebook Business research method (8th edition): Part 2 r time. And, families often look no further than their own pocketbook (or credit card statement) when they consider their greatest financial challengeEbook Business research method (8th edition): Part 2
s. The use of large-scale representative samples by the Gallup Corporation helped reveal these interesting ưends.'386Chapter 16: Sampling Designs and CHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 ew pages to get a sense of the writing style and content before deciding whether to buy. A high school student visits a college classroom to listen to a professor's lecture. Selecting a university on the basts of one classroom visit may not be scientific sampling, but in a personal situation, it may Ebook Business research method (8th edition): Part 2 be a practical sampling experience. When measuring every item in a population is impossible, inconvenient, or too expensive, we intuitively take a saEbook Business research method (8th edition): Part 2
mple.Although sampling IS commonplace in daily activities, these familiar samples are seldom scientific. For researchers, the process of sampling can CHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 ways to determine the appropriate sample design.Sampling TerminologyAs seen in the chapter vignette above, the process of sampling involves using a portion of a population to make conclusions about the whole population. A sample IS a subset, or some part, of a larger population. The purpose of sampl Ebook Business research method (8th edition): Part 2 ing IS to estimate an unknown characteristic of a population.Sampling IS defined in terms of the population being studied. A population (universe) isEbook Business research method (8th edition): Part 2
any complete group—for example, of people, sales territories, stores, or college students—that shares some common set of characteristics. The term popCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 us IS an investigation of al) the individual elements that make up the population—a total enumeration rather than a sample. Thus, if we wished to know whether more adult Texans drive pickup trucks than sedans, we could contact ever)' adult Texan and find out whether or not they drive a pickup truck Ebook Business research method (8th edition): Part 2 or a sedan. We would then know the answer to this question definitively.sampleA subset or some part of a larger popu'ationpopulation (univcrsclAny comEbook Business research method (8th edition): Part 2
plete group of entities that share some common set of characteristics.population element___________An individual member cf a popiAtion.censusAn investCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather than Ebook Business research method (8th edition): Part 2 umber of different wines. From this, the taster decides if he or she likes .1 particular wine and if it IS judged to be of low or high quality. If an entire bottle were consumed to decide, the taster may end up not caring care about the next bottle. However, in a scientific study in which the object Ebook Business research method (8th edition): Part 2 ive is to determine an unknown population value, why should a sample rather than a complete census lx- taken?CHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather thanCHAPTER 16 SAMPLING DESIGNS AND SAMPLING PROCEDURESAfter studying this chapter, you should be able to1.Explain reasons for taking a sample rather thanGọi ngay
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