Give a plausible example of a type of survey that might have

Give a plausible example of a type of survey that might have substantial coverage error, and say why. Note that coverage error results from not allowing all members of the survey population to have an equal or nonzero chance of being sampled. What can you do to limit coverage error?

Solution

Coverage error which includes both under- coverage and overcoverage, is defined as \"the error in an estimate that results from failure to include all units belonging to the defined population,inclusion of specified units more than once in the actual survey.

Example :- Most telephone surveys exclude cell-phone users

People who use cell-phones exclusively may not differ significantly in vote choice but might have big differences on attitudes toward technology.

Another Example :- In many country\'s election process excludes Women Voters.

Women voters there exclusively may not differ significantly in vote choice but might have big differences on attitudes toward their basic rights.

So What can you do to limit coverage error? If your sample frame excludes a large percentage of your target population, you need to think about how the people who are not covered might differ from those who are included in the sample frame.