Manufactured Homes: The Market Facts
2002 Report
Methodology, Weighting the Results and Limitation
Methodology
The
study, conducted by the Foremost Insurance Group of Companies, used NFO
WorldGroup's household panel. National Family Opinion has the largest
panel of households and consumers in the world. More than 600,000 cooperating
U.S. households make up that nationally represented panel and the reserve
pool.
These households have committed themselves to answer questions and their complete demographic profiles are on file. NFO WorldGroup's representative households are balanced to match exactly the U.S. Census percentage distribution in total and within each geographic division, according to market size, age of household head, annual household income and size of household. Quotas are drawn from the latest available U.S. Bureau of Census data.
In 2002, questionnaires went to 39,163 owners and/or residents of manufactured homes. Of those surveyed, 21,866 returned completed questionnaires for a usable return rate of 56%.
Weighting the Results
Results are weighted by state to reflect the current distribution of manufactured homes countrywide. The weights are based on the Census of Housing counts by state. The cases are weighted during processing using the WEIGHT command of the SAS system that is used to do the data analysis.
Limitation
The study is limited by the panel as opposed to
a random sample of owners and residents of manufactured homes. Since there
is no countrywide list of all existing owners of manufactured homes available
for sampling, the panel offers the only access to the entire existing
market.