Overcoverage Errors Occur When

Overcoverage errors occur when

A) some of the elements of the population selected to be part of the sample do not respond
B) the listed sample units are not contacted and happens with both personal and telephone surveys
C) because the information gathered is inaccurate or because mistakes are made while the data is being processed
D) there is duplication or overrepresentation of certain categories of sampling units in the sampling frame