Sampling

Question 1

What is random sampling?

Answer 1

People are randomly selected and asked for their opinions on a product. It may be taken as in every tenth of a person. There is chance that the person asked may not know anything about the product

Question 2

Advantages of random sampling

Answer 2

1. Personal opinions are given
2. Everyone had a chance of being chosen
3. They are easily organised and cheap

Question 3

Disadvantages of random sampling

Answer 3

1. Results are not accurate unless large sample is used
2. Method is unsuitable for some products e.g. highly specialised products
3. May not reach the most appropriate people

Question 4

What is quota sampling?

Answer 4

Where interviews are held with a set number of people who fall into RPE determined categories and reflect the type of product e.g. 50% males and 50% females. Also important that it reflects the composition if the people in the area

Question 5

Advantages of quota sampling

Answer 5

1. Results more accurate than random sampling
2. More likely to reach the appropriate people
3. Personal opinion ps are given by those surveyed

Question 6

Disadvantages of quota sampling

Answer 6

1. The composition of the population must be known for the correct proportions to be interviewed
2. The method is unsuitable for some products