Peter Hart Research conducts a national
telephone and internet survey of past
month music buyers (3,051 per year). Data
from the survey is weighted by age and sex,
and then projected to reflect the U.S.
population age 10-and-over. The reliability
of the data is ± 2.2% at a 95% confidence
level.With respect to genre, consumers
were asked to classify their music purchases;
they are not assigned a particular category
by Hart Research.
Source: Recording Industry Association of America, 2005.
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