Topic 1 Populations And Sampling

Question 1

What is the population

Answer 1

The group you are interested in

Question 2

What is a census

Answer 2

Investigates every member of the population

Question 3

Pros of a census

Answer 3

Takes into account the whole population so the data you get will be accurate

Question 4

Cons of a census

Answer 4

For big populations it is hard/impossible to do a census
Time consuming
Expensive
Impractical
Might not be able to define the whole population or access all the members
Isn’t an option when items are being used up or damaged

Question 5

What is sampling

Answer 5

Only choosing some members of the population

Question 6

Pros of sampling

Answer 6

Quicker
Cheaper
More practical on a large population

Question 7

Cons of sampling

Answer 7

Doesn’t give you information about every member of the population so can be less accurate and bias

Question 8

What is a sample frame

Answer 8

List/map of all the members of the population

Question 9

Why must a sample be representative

Answer 9

So that conclusions drawn can be applied to the whole population