When the studies report means and standard deviations, the preferred effect size is usually the raw mean difference, the standardized mean difference, or the response ratio. These effect …

This procedure calculates the sample size necessary to achieve a specified distance from the difference in sample means to the confidence limit(s) at a stated confidence level for a …

Honeybee scouts investigate new home or food source options; the scouts communicate the information to the hive with a “waggle dance.” Scientists took bees to an island with only two …

The standardized mean difference (SMD) for both continuous and binary variables can be computed using our SAS macro, which implements the standard SMD formula through base …

Dividing the difference by a large standard deviation, results in a relatively small standardized mean difference (top curve) whereas dividing the difference by a relatively small standard …

Objectives At the end of the presentation, the audience will be able to: Define the differences between a mean and proportion Determine the use of a mean vs. proportion in statistical …

In this document, we address the following question: can we judge whether two statistics are significantly different based on whether or not their confidence intervals overlap? The short …