- Scientists measured the weight of
100 randomly selected buffalo, because there was nothing good on TV
that evening. Their average weight was 1200 pounds The population
is every individual that could possibly be of interest. We're
talking buffalo here, so the population is all the buffalo. Yep,
every single one. the sample will be representative of the whole
population. The 100 buffalo measured are the sample here.
- Consider a box containing 500
balls of three different colors. This set of balls is called the
population.
If you select for example 50 balls out
of this box - a subset of the population - this set of 50 balls is
called a sample.
- if we are studying the weight of
adult women, the population is the set of weights of all the women
in the world
Now suppose we randomly select 100
women to study thier weight then 100 women selected will be the
sample