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.
Idea and demo example. The idea of two sample t-test is to compare two population averages by comparing two independent samples. A common experiment design is to have a test and control conditions and then randomly assign a subject into either one. One variable to be measured and compared between two conditions (samples).