CLUSTER SAMPLING Commonly used when: Frame for elements is relatively difficult to obtain Frame for clusters of elements of elements is relatively easy to obtain Examples: Classrooms versus students City blocks versus residents Cartons of items stored in a warehouse versus individual items
Names to Explore P. C. Mahalanobis –"The I.S.I. has taken the lead in the original development of the technique of sample surveys, the most potent fact finding process available to the administration". R. A. Fisher Walter Shewhart Jerzy Neyman William Cochran Edwards Deming Warren Mitofsky
References Groves, Robert; Dillman, Donald; Eltinge, John; and Little, Roderick, editors. 2002. Survey Nonresponse. New York: Wiley. Lohr, S. 1999. Sampling: Design and Analysis, Pacific Grove, CA: Brooks Cole. Scheaffer, Richard; Mendenhall, William; and Ott, R. Lyman. 1996. Elementary Survey Sampling, 5 th ed. Belmont,CA: Duxbury Press.