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.
Variations of the t-Test: More details 1 Pooled Standard Error versus the Satterthwaite Approximation In this segment weâll clarify the differences between the two methods of accounting for two sample variances by running through the equations in a little more detail.