Sampling Techniques

Question 1

Examples of sampling techniques

Answer 1

Random
Opportunity
Volenteer
Systematic
Stratified

Question 2

What is random sampling

Answer 2

Every person in target population can be chosen
Generate random numbers or names out of hat

Question 3

What is opportunity sampling

Answer 3

People who are available at the time the study is carried out
E.g ppl in the common room

Question 4

What is volenteer sampling

Answer 4

Participants are recruited through an advert and volenteer themselves

Question 5

What is systemic sampling

Answer 5

System us used to select participants
Eg every 4th person to leave the refectory (Nth)

Question 6

What is stratified sampling

Answer 6

If a random sample by chance is all boys, you identify subgroups and target each one randomly

Question 7

Advantage of opportunity

Answer 7

Reduces cost and time

Question 8

Disadvantage of opportunity

Answer 8

Produces bias due to small groups not being represented

Question 9

Advantage of random

Answer 9

Unbiased

Question 10

Disadvantage of random

Answer 10

Takes time due to having to contact those who have been selected

Question 11

Advantage of stratified

Answer 11

Most representative

Question 12

Disadvantage of stratified

Answer 12

Time consuming to identify groups

Question 13

Advantage of systematic

Answer 13

Unbiased

Question 14

Disadvantage of systematic

Answer 14

Not truly random

Question 15

Advantage to volenteer

Answer 15

Can reach a wide variety of people

Question 16

Disadvantage of volenteer

Answer 16

Sample may be biased towards people who are confident enough to volenteer