2.8.11 - sample A large sample is always representative of...

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(2.8.11) Sample Size Determination One of the most controversial aspects of sampling o No single sample size formula/method General principles for determining an acceptable sample size o 1. Research method used i.e. focus groups: 6-12 pretest/pilot study: 10-50 o 2. Cost and Time considerations always control sample size o 3. Use information available in published research. (Average sample size…?) o 4. Generally speaking (probability sample) “the larger the sample, the beter.” But… the quality of a sample is more important than its mere size Misconception about the representativeness of a
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Unformatted text preview: sample A large sample is always representative of the population (false) As the sample size increases the sample error decreases (negative association) Ethical Decisions in Research Matter of agreement among members of a group o Anyone involved in social scientific research needs to be aware of the general agreements shared by all social scientists o Responsibility beyond law o Protection of basic human rights o Obligation to work for the good of society *See Handout for 4 Ethical Principles in Conducting Research*...
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