What is a coverage error in statistics?

Coverage error is the error in an estimate that results from failure to include specified units in the conduct of a survey (undercoverage), and inclusion of some units erroneously either because of a defective frame or because of inclusion of unspecified units or inclusion of specified units more than once in the …

What causes coverage error?

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.

What is a coverage problem?

Abstract: One fundamental issue in sensor networks is the coverage problem, which reflects how well a sensor network is monitored or tracked by sensors. The sensing ranges of sensors can be unit disks or non-unit disks. …

What is the difference between coverage and coverage error?

Random samples let you use collect data from a portion of a population and use sampling statistics to generalize your findings to a large population. Coverage Error occurs when some members of a population are excluded from the sample frame you use for your study.

What is coverage error example?

Overcoverage could occur if some voters have more than one listed phone number. In this example, undercoverage, overcoverage, and bias due to inclusion of unregistered voters in the sampling frame are examples of coverage error.

What is a coverage error What kind of problem does it cause in sampling?

Coverage error is a bias in a statistic that occurs when the target population does not coincide with the population actually sampled. Coverage error results because of undercoverage and overcoverage. Undercoverage occurs when members of the target population are excluded.

How do you fix a coverage error?

One way to reduce coverage error is to rely on multiple sources to either build a sample frame or to solicit information. This is called a mixed-mode approach.

Which of the following is a source of coverage error?

The source of the coverage error may be an inadequate sampling frame or flaws in the implementation of the data collection. Coverage error results because of undercoverage and overcoverage. Undercoverage occurs when members of the target population are excluded. Overcoverage occurs when units are included erroneously.

What is coverage in WSN?

Wireless Sensor Networks (WSNs) consist of several battery powered sensor nodes. The sensing coverage of the Field of Interest (FoI) is an important function of the sensor nodes in connected WSNs. A FoI is said to be covered if each point in the FoI is monitored by at least one sensor node.

What is maximal covering location problem?

The covering location problem is often categorized as Location Set Covering Problem (LSCP) and Maximal Covering Location Problem (MCLP). In a classical MCLP, one seeks the location of a number of facilities on a network in such a way that the covered population is maximized.

What is census coverage error?

Coverage error reflects error on the part of the respondent and on the part of census operations. Undercoverage can occur in the first stage of the census if the list of dwellings constructed to cover the census dwelling universe is incomplete. Dwellings that have just been built are particularly difficult to list.

What is coverage bias example?

For example, internet surveys can introduce coverage bias because a (albeit shrinking) ‘digital divide’ still exists. This means that people who do not use or do not have access to the internet will automatically be excluded from the sample. Landline telephone surveys are another good example.

What is the definition of a coverage error?

Coverage error is a type of non-sampling error that occurs when there is not a one-to-one correspondence between the target population and the sampling frame from which a sample is drawn.

Why do I have a net coverage error?

Coverage error results because of undercoverage and overcoverage. Undercoverage occurs when members of the target population are excluded. Overcoverage occurs when units are included erroneously. The net coverage error is the difference between the undercoverage and the overcoverage.

Why is the sample frame included in coverage error?

The sample frame includes undercoverage because not all of the target population is included in the sample frame. Coverage error is a type of non-sampling error that occurs when there is not a one-to-one correspondence between the target population and the sampling frame from which a sample is drawn.

What can be done to reduce coverage error?

After the completion of the census, random samples from the frame could be drawn to be counted again. One way to reduce coverage error is to rely on multiple sources to either build a sample frame or to solicit information. This is called a mixed-mode approach.