sampling

Question 1

volunteer sampling strength

Answer 1

• quick, convenient, economical way of sampling
• useful when the target population is hard to detect

Question 2

volunteer sampling weakness

Answer 2

• often unrepresentative as it look at if subjects are free and not entire population and what is needed
• researchers often have to wait long time for participants to volunteer

Question 3

opportunity sample strength

Answer 3

• quick, convenient, economical way and family, friends can be chosen.
• useful when investigating processes that are thought to work in similar ways with others

Question 4

opportunity sample weakness

Answer 4

• unrepresentative sample as researcher chose participant on whether they are helpful
• within the opportunity sample participants want to decline to take part so it becomes a self-selected sample

Question 5

stratified strength

Answer 5

• deliberate effort made to identify characteristics representative of the target population.
• representative sample as everyone in the population has an equal chance of being in the sample.

Question 6

stratified weakness

Answer 6

• time consuming to identify subcategories and calculating their proportion to the target population
• relies on the researcher knowing all the required groups and forces choices of the individuals which can bias by leaving some out

Question 7

random strength

Answer 7

• from the beginning it is clear who the sample is and how it was selected, so any bias can be mathematically taken into account
• representative unbiased sample as the entire target population has an equal and fair chance of being part of the sample.

Question 8

random weakness

Answer 8

• larger the population harder it becomes to compile an original selection list of everyone becomes impractical.
• lots of time taken to gather the target population to sample from.