Sampling

Question 1

What are the 6 types of sampling

Answer 1

• Random
• Stratified
• Snowball
• Systematic
• Quota
• Opportunity

Question 2

Random

Answer 2

Picking out names out a hat

+ everyone in population chance of getting chosen
+ Easy to create
+ can be generated by a computer

• can be unrepresentative sample

Question 3

Stratified

Answer 3

Sample reflects proportions of different groups

50% male then 50% of sample should be male

+Provides representative sample
- Can be complicated to create the sample

Question 4

Snowball

Answer 4

Find a few participants and ask them to find participants themselves and so on

+ useful when researching hard to access groups

• sample can be unrepresentative

Question 5

Systematic

Answer 5

Picking nth person from all possible participants

N= no. of participants/ no. needed for sample

+ relatively easy to create

• can lead to unrepresentative sample

Question 6

Quota

Answer 6

Sample needs to fit with certain quotas e.g 30/90 need to be unemployed

+ representative sample
- can be difficult to find enough ppl to fill quota

Question 7

Opportunity

Answer 7

Uses ppl from target audience available at time

Based on convenience

+ quick and easy

• can lead to unrepresentative sample