Between-subjects statistics for two groups
Between-subjects statistics are used to compare two independent groups on an outcome
For categorical outcomes and two groups, researchers calculate the odds ratio for having an outcome.
With ordinal outcomes, researchers compare the medians and interquartile ranges of two independent groups to see if there is a statistically significant difference.
When continuous outcomes are used with two groups, researchers have to meet the statistical assumptions of independence of observations, normality, and homogeneity of variance in order to compare the means and standard deviations between groups.
If the statistical assumptions are not met for between-subjects statistics for two groups, then researchers can use non-parametric statistics to compare independent groups on a continuous outcome.
What is the scale of measurement for the outcome in the between-subjects analysis?
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