Sampling

Question 1

What is a population?

Answer 1

All members of a group that is to be sampled

Question 2

What is a sample? (3)

Answer 2

1. Portion of the population
2. The larger the sample the more reliable it is
3. Should aim to represent the characteristics of the population to avoid bias

Question 3

What are the adv/disadvantages of a sample? (4)

Answer 3

1. Cheaper
2. Less time consuming and less data to be considered
3. Not completely representative
4. May be biased

Question 4

What is a census?

Answer 4

Data collected from all members of a population

Question 5

What are the adv/disadvantages of a census? (4)

Answer 5

1. Unbiased
2. Accurate and takes the whole population into account
3. Time consuming and lots of data to handle
4. Expensive

Question 6

What is a sampling unit?

Answer 6

Item to be sampled

Question 7

What is a sampling frame?

Answer 7

A list of all the sampling units