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.
Independent Samples t-test. The t-test is used to compare the values of the means from two samples and test whether it is likely that the samples are from populations having different mean values.When two samples are taken from the same population it is very unlikely that the means of the two samples will be identical.ndependent Samples t-test. The t-test is used to compare the values of the means from two samples and test whether it is likely that the samples are from populations having different mean values.