Sampling

Question 1

what is a target population

Answer 1

• subset of general population

Question 2

Outline what a random sample is and how the target population is picked

Answer 2

• all members of the target population have an equal chance of being selected, lottery method is used

Question 3

What is a systematic sample

Answer 3

• when every nth number of the tp is selected, a sampling frame is then produced, a sampling system is nominated, this interval can be randomly determined to reduce bias
  for eg every 5th person is picked etc

Question 4

What is a stratified sample

Answer 4

• researcher first identifies strata
• proportions are worked out
• ppts are randomly selected

Question 5

What is an opportunity sample

Answer 5

• anyone who is willing is selected

Question 6

What is volunteer sampling

Answer 6

• when the members from a target population willingly volunteer to take part and so are chosen

Question 7

1-What is a strength of random sampling

2-What is a limitation of it

Answer 7

• free of researcher bias

- difficult and time-consuming

Question 8

What is a strength of systematic sampling

Answer 8

• avoids researcher bias, and is usually representative

Question 9

1-What is a strength of stratified sampling

2-What is a limitation of it

Answer 9

• avoids researcher bias, representative, can be generalisable
• complete representation of target population is not possible

Question 10

1-What is a strength of opportunity sampling

2-What is a limitation of it

Answer 10

• saves time and money

- unrepresentative of target population, bias as researcher has ability to pick and choose

Question 11

1-What is a strength of volunteer sampling

2-What is a limitation of it

Answer 11

• easy, minimal input from researcher, less time-consuming

- volunteer bias is a problem