Why do we need interpolation…..?
•To
approximate some quantity using information adjacent to it
(constructing new data points using known
data points)
•To
make relationships between quantities using available information
(fitting curves which satisfy known data
points)
eg. Live births registered in Sri Lanka
(Census data: www.statistics.gov.lk)
What would be the number of births in
1993 and 2002 ?Interpolation
What would be the number of births in
1990 and 2011 ?
Extrapolation
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