Sampling

Question 1

Opportunity

Answer 1

Involves asking whoever is most easily available and willing to take part at the time of the study
Adv - convenient in terms of cost and is easy to obtain large samples
Dis adv - sample is most likely to to be biased because its similar people who support their hypothesis . Therefore hard to be generalised to the wider population

Question 2

Opportunity

Answer 2

Involves asking whoever is most easily available and willing to take part at the time of the study
Adv - convenient in terms of cost and is easy to obtain large samples
Dis adv - sample is most likely to to be biased because its similar people who support their hypothesis . Therefore hard to be generalised to the wider population

Question 3

Volunteering

Answer 3

Advertising for volunteers . People who want to take part
Adv-most likely to be motivated to take part and have interest - more serious
Dis adv-may not be representative of large population
As they are all similar

Question 4

Systematic

Answer 4

Involves in computer based chosen people eg the nth person in a list
Adv-selection is not biased
Disadv- some people may refuse to take part - smaller sample
May end up with a sample dominated with males/ females

Question 5

Random

Answer 5

Choose a random member of the target population - everyone has an equal chance of being selected
They can be selected by putting names of the whole population in a hat
Adv-no praised and not everyone will support their hypothesis
Disadv-participants may refuse to take place , may have small sample -time consuming
- could consist of mainly males or females

Question 6

Stratified

Answer 6

Makes sure the sample is reflective of the target audience
They select a certain percentage of people with the same identification eg gender , age
Adv- more representative as each sector of the target population can be applied to wider population
Disadv- its complex and time consuming