Calculate and display CIs for your data, for three simple experimental designs

These three simple tools allow you to enter your own data for three designs: Case 1, Single Group (pictured); Case 2, Two Independent Groups; and Case 3, Paired Data. The data are shown as a dotplot. For Case 1 you select a µo value as a reference value for the mean. The CI, based on your dataset, for the population mean is shown. Noting whether the CI captures µo is equivalent to conducting the corresponding t test. These tools use original measurement units throughout and are provided as an introductory step towards the more complex CIdelta, in which standardised units (Cohen’s d) are shown alongside original units.