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). https://www.pedro.org.au/english/downloads/confidence-interval-calculator/. Accessed on [date].
Confidence interval calculator download
If you are unable to open CIcalculator.zip follow this link to download WinZip.
If you are unable to open CIcalculator.sit follow this link to download StuffIt Expander.