Interesting question, Sara.
This is a SURVEY, not a study, fyi.
Here's a link to their methodology page. While it doesn't say it weights by
SES, they claim to have a representative sample. I'll leave the parsing to
better minds than mine.
Looking forward to the discussion.
Phyllis
http://www.well-beingindex.com/methodology.asp
The Gallup-Healthways Well-Being Index tracks the well-being of U.S.
residents throughout the year, interviewing no fewer than 500 U.S. adults
nationwide each day, with the exception of major holidays. Interviews are
conducted with respondents on landline telephones and cellular phones, with
interviews conducted in Spanish for respondents who are primarily
Spanish-speaking.
Each daily sample includes a minimum quota of 150 cell phone respondents
and 850 landline respondents, with additional minimum quotas among landline
respondents for gender within region. Landline respondents are chosen at
random within each household on the basis of which member had the most
recent birthday.
Samples are weighted by gender, age, race, Hispanic ethnicity, education,
region, adults in the household, cell-phone-only status, cell-phone-mostly
status, and phone lines. Demographic weighting targets are based on the
March 2009 Current Population Survey figures for the aged 18 and older
non-institutionalized population living in U.S. telephone households. All
reported margins of sampling error include the computed design effects for
weighting and sample design.
With the inclusion of the cell-phone-only households and the Spanish
Language interviews, 98% of the adult population is represented in the
sample. By comparison, typical landline-only methodologies represent
approximately 85% of the adult population.
In addition to sampling error, question wording and practical difficulties
in conducting surveys can introduce error or bias into the findings of
public opinion polls.
Click
here<http://well-beingindex.com/files/Gallup-Healthways%20Index%20Method…
to
download the formal methodology and Well-Being Index research report.
--
Phyllis Orrick
Communications Director
Safe Transportation Research and Education
Center<http://www.safetrec.berkeley.edu/>
(SafeTREC)
University of California Transportation Center <http://www.uctc.net/> (UCTC)
Institute for Urban and Regional Development <http://www.iurd.berkeley.edu/>
(IURD)
California Active Transportation Safety Information
Pages<http://catsip.berkeley.edu/>
(CATSIP)
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