Confidence interval calculator

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). Accessed on [date].

Confidence interval calculator download

Download uncompressed .xls file (PC/MAC)

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