Overcoverage occurs in survey sample frames when the frame contains more than enough sample records. This primarily results from two situations. ... This type of overcoverage is sometimes called a "multiplicity of elements." In other cases, sample records fail to lead to members of the target population.

What is Overcoverage bias?

Overcoverage could occur if some voters have more than one listed phone number. Bias could also occur if some phone numbers listed in the directory do not belong to registered voters.

What do you mean by coverage error in census?

Coverage error occurs when members of the population of interest in are not in the sampling frame—the list of individuals, businesses, or households used to select the sample. Sampling error occurs because our survey estimates are produced from only a subset of the population of interest.