This is an Excel spreadsheet that can be used to calculate confidence intervals for a mean, the difference between two means, a proportion or odds, comparisons of two proportions (the absolute risk reduction, number needed to treat, relative risk, relative risk reduction and odds ratio), sensitivity, specificity and two-level likelihood ratios.
A suggested citation for the confidence interval calculator is:
Herbert R. Confidence Interval Calculator (2013). http://www.pedro.org.au/english/downloads/confidence-interval-calculator/. Accessed on [date].
Confidence interval calculator download
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