Chapter 7 Business Research Methods Donald Cooper Pamela
Chapter 7 Business Research Methods ä Donald Cooper ä Pamela Schindler Irwin/Mc. Graw-Hill ©The Mc. Graw-Hill Companies, Inc. , 2001
Chapter 7 Sampling Design Irwin/Mc. Graw-Hill ©The Mc. Graw-Hill Companies, Inc. , 2001
Click. Selection to edit Master title style of Elements Slide 7 - 1 Population Element Sampling Census Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit title style What is a. Master Good Sample? Slide 7 - 2 ä Accurate: absence of bias ä Precise estimate: sampling error Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to of edit. Sampling Master title style Types Designs Slide 7 - 3 Probability Nonprobability Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit Master title style Steps in Sampling Design Slide 7 - 4 ä What is the relevant population? ä What are the parameters of interest? What is the sampling frame? ä What is the type of sample? ä What size sample is needed? ä How much will it cost? Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Concepts to help understand Click to edit Master title style Probability Sampling Slide 7 - 5 Standard error Confidence interval Central limit theorem Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit Master title. Designs style Probability Sampling Slide 7 - 6 Simple random Systematic Stratified äProportionate äDisproportionate Cluster Double Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit Master style Designing Clustertitle Samples Slide 7 - 7 ä How homogeneous are the clusters? ä Shall we seek equal or unequal clusters? ä How large a cluster shall we take? ä Shall we use a single-stage or multistage cluster? ä How large a sample is needed? Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit Master Sampling title style Nonprobability Slide 7 - 8 Reasons to use ä Procedure satisfactorily meets the sampling objectives ä Lower Cost ä Limited Time ä Not as much human error as selecting a completely random sample ä Total list population not available Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
Click to edit Master title style Nonprobability Sampling Slide 7 - 9 Convenience Sampling Purposive Sampling äJudgment Sampling äQuota Sampling Snowball Sampling Irwin/Mc. Graw-Hill ÓThe Mc. Graw-Hill Companies, Inc. , 2001
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