1.1 populations and samples Flashcards
(7 cards)
1
Q
what is a population?
A
the whole set of items that are of interest
2
Q
what is a census?
A
observes/measures every member of a population
3
Q
what is a sample?
A
part of the population is used to find out information about the population as a whole
4
Q
Advantages of a census
A
accurate result
5
Q
disadvantages of a census
A
- time-consuming/expensive
- hard to process a large quantity
- cannot be used when testing involves destruction
6
Q
advantages of a sample
A
-less time consuming and expensive
- fewer people to respond
-fewer data to process
7
Q
disadvantages of a sample
A
- not accurate
- sample size may be small to give information about subgroups of the population
