Sampling methods

Question 1

Opportunity sampling

Answer 1

taking a sample from people available at that current moment

Ad - Quick and easy
Dis ad - Wont be representative of the majority of the target audience

Question 2

Random sampling

Answer 2

Every member of population has a chance of being chosen like a lottery

Ad - truly representative sample of people
dis - Difficult on large scale / issues with withdrawal

Question 3

Snowball sampling

Answer 3

recruits in study recruit people they know and so on

ad - Useful to access hard groups of people
dis - not true sectional as its friends of friends

Question 4

Self selected sampling

Answer 4

they volunteered

ad - very simple
dis - very bias and reliant on others

Question 5

Stratified sampling

Answer 5

Sectioning population into Category and choosing a sample from each Category

ad - Likely to be much more representative than other methods because it is proportional representation of subgroups
dis - very time consuming

Question 6

Systematic sampling

Answer 6

Where they use a system to select participants

ad - unbias
dis - Not truly unbias

Question 7

Quota sampling

Answer 7

Stratified sampling but not random