Sampling

Question 1

What are the different types of sampling?

Answer 1

Random
Systematic
Stratified
Opportunity
Volunteer

Question 2

What’s random sampling?

Answer 2

All members of population have an equal chance of being selected
Selected by a random number generator

Question 3

What’s systematic sampling?

Answer 3

Every nth member of the population is selected e.g every 5th person on the register

Question 4

What’s stratified sampling?

Answer 4

Composition of sample reflects the proportions of the people in certain subgroups within target or wider population
Researcher identifies different strata that make up population the proportions needed for the sample to be representative are worked out. Finally participants make up each stratum selected using random sampling

Question 5

What’s opportunity sampling?

Answer 5

Researchers select anyone who’s willing and available

Question 6

What’s volunteer sampling?

Answer 6

Particpants select themselves to be part of sample
May be done by researcher placing an advertisement in newspaper

Question 7

Evaluation of random sample

Answer 7

Unbiased
Difficult
Time consuming

Question 8

Evaluation of systematic sample

Answer 8

Objective
Time consuming
Participants may refuse to take part

Question 9

Evaluation of stratified sampling

Answer 9

Generalisation of findings are possible
Cannot reflect all the time as everyone is different

Question 10

Evaluation of opportunity sampling

Answer 10

Less costly
Cannot be generalised
Researcher bias can occur

Question 11

Evaluation of volunteer sampling

Answer 11

Minimal input from researcher
Less time consuming
Volunteer bias can occur (asking for volunteers may attract a certain profile of people - more likely to try and please the researcher)