populations and samples 1.1 Flashcards
1
Q
Census
A
observes or measures every member of a population.
2
Q
Population
A
the whole set of items that are of interest
3
Q
Sample
A
some subset of the population intended to represent the population
4
Q
sample unit
A
each individual thing in the population that can be sampled
5
Q
sampling frame
A
often sampling units of a population are individually named or numbered to form a list
6
Q
Advantages of census
A
- it should give completely accurate results
7
Q
Disadvantages of census
A
- Time consuming and expensive
- Cannot be used when the testing
process destroys the item - Hard to process large quantity of data
8
Q
Advantages of samples
A
- Less time-consuming and expensive than
a census - Fewer people have to respond
- Less data to process than in a census
9
Q
Disadvantages of samples
A
- The data may not be as accurate
- The sample may not be large enough
to give information about small subgroups of the population
