Two ways to estimate population values from
sample values
Point estimation
Using a sample statistic to estimate a population
parameter based on a single value
e.g. if a random sample of Malay births gave
=3.5kg, and we use it to estimate , the mean
birthweight of all Malay births in the sampled
population, we are making a point estimation
Point estimation ignores sampling error
Interval estimation
using a sample statistic to estimate a population
parameter by making allowance for sample variation
(error)
