The Interesting Thing About Confidence Intervals Established Employing Stratified Sampling

question 29

Multiple Choice

The interesting thing about confidence intervals established employing stratified sampling is that

• A) the within-strata variability does not enter into the calculation of the standard error of estimate.
• B) the between-strata variability does not enter into the calculation of the standard error of estimate.
• C) neither the within-strata variability nor the between-strata variability enters into the calculation of the standard error of estimate.
• D) the confidence interval is wider than that established employing simple random sampling.
• E) the sample mean provides a biased estimate of the population mean.

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