Biostatistics with R by Babak Shahbaba

Author:Babak Shahbaba
Language: eng
Format: epub
Publisher: Springer New York, New York, NY

6.8 Margin of Error

For the above example, we can write the 95% CI for the population proportion of women who smoke during their pregnancy as follows:

In this case, the term 2×SE=2×0.03=0.06 is called the margin of error for 0.95 confidence level. In general, it is common to present interval estimates for c confidence level as

That is, the margin of error of an estimate is the half-width of the confidence interval. For the smoking during pregnancy example, our interval estimate can be written as

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