A method that is used to ensure that a
generalization about a population is reliable is called sampling to collect
dada about a population at large or diverse. Sampling consists of selecting
only some members of group and then making a generalization about the entire
population that is based on only those few members of the group. A
representative sample is a sample that is similar to the larger population from
which it was drawn. When a pollster wants to get a representative sample, they
use the method called random sampling. Random sampling is where every member of
the population has an equal chance of being a part of the sample. Another type
of sample is self-selected sample. The self-selected sample is a sample where
only the people most interested in the poll or survey participate. This usually
occurs on polls that are sponsored by television shows such as American Idol or
award shows such as the VMA's where it is unrepresentative since its relied on
the phone calls from viewers or the subscribers.
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