Chapter_06 cont

# Chapter_06 cont - STEPS IN THE SAMPLING PROCESS Define the...

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STEPS IN THE SAMPLING PROCESS Define the Population Specify Sampling Frame Specify Sampling Method Determine the Sample Size

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Sample Size Determination All You Can Afford Approach Statistical Approach national samples (1,000 - 1,200 respondents) regional samples (500 - 600 respondents) local samples (350 - 450 respondents)
STEPS IN THE SAMPLING PROCESS Define the Population Specify Sampling Frame Specify Sampling Method Determine the Sample Size Specify Sampling Plan

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STEPS IN THE SAMPLING PROCESS Define the Population Specify Sampling Frame Specify Sampling Method Determine the Sample Size Specify Sampling Plan Select the Sample
Factors Affecting Sample Size for Probability Designs Variability of the population characteristic under investigation Level of confidence desired in the estimate Degree of precision desired in estimating the population characteristic

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When estimating a population mean n = (Z2CL)(σ2/e2) When estimates of a population proportion are of concern n = (Z2CL)([P x Q]/e2) Probability Sampling and Sample Sizes
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