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.
1 Introduction. A paired t-test is used to compare two population means where you have two samples in. which observations in one sample can be paired with observations in the other sample. Examples of where this might occur are: â¢ Before-and-after observations on the same subjects (e.g. studentsâ diagnostic test. results before and after a particular module or course).