Populations and samples Flashcards
unit 1.1
1
Q
What is a population ?
A
the whole set of items that are of interest
2
Q
What is a census ?
A
something that observes/measures every member of a population
3
Q
What is the positive of a census ?
A
accuracy
4
Q
What are the negatives of a census ?
A
time consuming
expensive
5
Q
What is a sample ?
A
a selection of observations taken from a subset of the population to find out info on the population as a whole
6
Q
What are the positives of a sample ?
A
less time consuming
less expensive
fewer people to respond
less data to process
7
Q
What are the negatives of a sample ?
A
less accurate
may not be large enough
8
Q
What is a sampling unit ?
A
individual units of a population
9
Q
What is a sampling frame ?
A
sampling units individually named to form a list
