Studied by 4 people
What is meant by a population?
A whole set of items that are of interest
What is meant by a census
a census observes or measures every member of a population
What is meant by a sample
a selection of observations taken from the population
What is meant by a sampling unit
an individual unit of a population
What is meant by a sampling frame
a (numbered) list of the sampling units
State one advantage of taking a census
it should give a completely accurate result
State the disadvantages of taking a census
time consuming and expensive
cannot be used when the testing process destroys the item
hard to process large data sets
State 2 advantages of taking a sample
less time consuming and expensive
less data to process
State a disadvantage of taking a sample
the data may not be representative of the population
Typical answer for how to make the results of a sample more accurate
Increase the number of _____ being sampled
