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February 18, 2013

A little note on CIs

Writing about web page http://www.scotland.gov.uk/Topics/Statistics/Browse/Health/scottish-health-survey/ConfidenceIntervals

Confidence Intervals are pretty mega, but sometimes it can be difficult to create a graphical representation showing a point estimate (e.g. the mean) and the corresponding confidence interval.

Fortunately, this Scottish Health Survey web page has a nice summary explaining what CIs are, and a further explanation as to how to graph them in Excel.

For CIs in Stata, the following might be useful:

http://www.biostat.jhsph.edu/courses/bio622/misc/graphci_methods_2009_revised.pdf

But you may need to prepare the data in Stata before running the syntax.


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