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.
Hypothesis Testing and the Statistics T-Test. The t-test is probably the most commonly used Statistical Data Analysis procedure for hypothesis testing. Actually, there are several kinds of t-tests, but the most common is the two-sample t-test also known as the Student's t-test or the independent samples t-test. The two sample t-test simply tests whether or not two independent populations have different mean values on some measure. For example, we might have a research hypothesis that rich people have a different quality of life than poor people.