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  1. Overview
  2. Mean, σ known
  3. Mean, σ estimated
  4. General formula
  5. Difference between means of independent groups, σ known
  6. Difference between means of independent groups, σ estimated
  7. Linear combination of means from independent groups
  8. Pearson's correlation
  9. Difference between correlations
  10. Proportion
  11. Difference between proportions
  12. Exercises

precision consulting

Analysis Tools
Analysis Lab
Rice Virtual Lab in Statistics

by John Pezzullo

by Webster West

by Richard Lowry

Confidence interval on Pearson's r
by John Behrens

Binomial and poisson confidence intervals
by John C. Pezzullo

Instructional Demos

Confidence intervals
Rice Virtual Lab in Statistics

Confidence interval applet
by Webster West

Confidence intervals for means
by Charles Stanton

Interpreting study results: confidence intervals
by Gordon Guyatt, Roman Jaeschke, Nancy Heddle, Deborah Cook, Harry Shannon, Stephen Walter

One continuous variable, Two continuous variables, Proportions, Linear regression
by Keith Dear

Confidence intervals
by P. B. Stark

Statements of probability and confidence intervals, The t tests
by T. D. V. Swinscow; revised by M. J. Campbell

Confidence limits for the correlation
by Will Hopkins

by StatTrek

Statistics for the Utterly Confused
by Lloyd Jaisingh

Forgotten Statistics : A Self-Teaching Refresher Course
by Jeffrey Clark

Chances Are : The Only Statistics Book You'll Ever Need
by Stephen Slavin

The Cartoon Guide to Statistics
by Larry Gonick and Woollcott Smith