1. A new screening method is intended to detect breast cancer early enough to prevent development of late stage, invasive cancers in women.Suppose this new method of screening is pilot tested, and the devise is found to over-represent the number of cases of breast cancer.

A)Describe the device with regard to its accuracy.

B)What are some possible side-effects (impacts) of such a device?

1. The National Health and Nutrition Examination Survey (NHANES) conducts a nationwide investigation concerning the health status of Americans. In order to adequately sample the population, the survey team undergoes a complex procedure that involves sampling districts, sampling neighborhoods within those districts, sampling street blocks within those districts, and then sampling households on those street blocks. What sampling method is involved in this procedure?