1. Determine what confidence interval you want. The confidence interval is the range within which your answer is accurate. For example, if you have a 5 percent confidence interval
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Three important principles of sampling survey are: 1. Principle of validity. 2. Princilpe of statistical regularity. 3. Principle of optimization.
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( ′sam·pəl ′sər·vā ) (statistics) A survey of a population made by using only a portion of the population.
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