Provides answers to commonly asked questions about COBRA. Health Benefits Under the Consolidated Omnibus Budget Reconciliation Act (COBRA) (PDF) Provides a detailed overview of the major provisions of COBRA.
In the two-sample pooled t-test the pooled variance is computed by averaging the two individual sample variances. The assumptions for the two-sample pooled t-test for the difference in two means are that there are random samples from two independent normal populations with common but unknown variance.
Two-sample t-test â Common Mistake: Sometimes you will have what appear to be two independent samples, but are really two observations each on a single set of units. Use one-sample methods for inference on such data. This sample will consist of the differences between the two values for each subject.