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 tests: overview Types of two-sample tests:âtwo-sample z-testâtwo-sample t-testâtwo-sample test of proportions. Two-sample z-test The Setting: You want to determine whether two different populations have the same mean for some variable of interest, so you draw two independent samples.