||The topic of this article may not meet Wikipedia's general
notability guideline. (March 2013)| ||This article includes a
list of references, but its sources remain unclear because it
has insufficient inline citations. (September 2012)| Estimation
is the process of finding an estimate, or approximation, which
is a value that is usable for some purpose even if input data
may be incomplete, uncertain, or unstable. The value is
nonetheless usable because it is derived from the best
information available. Typically, estimation involves "using the
value of a statistic derived from a sample to estimate the value
of a corresponding population parameter". The sample provides
information that can be projected, through various formal or
informal processes, to determine a range most likely to describe
the missing information. An estimate that turns out to be
incorrect will be an overestimate if the estimate exceeded the
actual result, and an underestimate if the estimate fell short
of the actual result. How estimation