Methodology

Applied survey methods : a statistical perspective by Jelke Bethlehem

By Jelke Bethlehem

1. The survey method -- 2. uncomplicated suggestions -- three. Questionnaire layout -- four. unmarried sampling designs -- five. Composite sampling designs -- 6. Estimators -- 7. information assortment -- eight. the standard of the consequences -- nine. The nonresponse challenge -- 10. Weighting adjustment -- eleven. on-line surveys -- 12. research and book -- thirteen. Statistical disclosure keep an eye on

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It should be rather simple to detect overcoverage in the field. This should become clear from the answers to the questions. Another example is given to describe coverage problems. Suppose a survey is carried out among the inhabitants of a town. It is decided to collect data by means of telephone interviewing. At first sight, it might be a good idea to use the telephone directory of the town as the sampling frame. But this sampling frame can have serious coverage problems. Undercoverage occurs because many people have unlisted numbers, and some will have no phone at all.

The sample is selected in the design phase of the survey, say on April 1. It is a large survey, so data collection cannot be completed in 1 day. Therefore, interviews are conducted in a period of 2 weeks, starting 1 week before the reference date and ending 1 week after the reference date. Now suppose an interviewer contacts a selected person on April 29. Thereafter, it turns out that the person has moved to another town. It becomes a case of overcoverage. What counts is the difference in the situation on May 1, as the person does not belong anymore to the target population at the reference date.

This refers to the situation where the sampling frame contains elements that do not belong to the target population. If such elements end up in the sample and their data are used in the analysis, estimates of population parameters may be affected. It should be rather simple to detect overcoverage in the field. This should become clear from the answers to the questions. Another example is given to describe coverage problems. Suppose a survey is carried out among the inhabitants of a town. It is decided to collect data by means of telephone interviewing.

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