Sampling, Data Presentation and Interpretation (C11)

Question 1

What is simple random sampling?

Answer 1

1) Every item in the population has an equal chance of being in the sample.

Question 2

What is systematic sampling?

Answer 2

1) Selects the nth member from the population your investigating.

Question 3

What is stratified sampling?

Answer 3

1) The population is divided into categories with the same proportion of the sample as the overall population for each group.
2) Find number needed in each category using:
(size of category in pop/total size of pop) X total sample size.

Question 4

What is opportunity sampling?

Answer 4

1) You choose members of the population which are easiest to sample.

Question 5

What is cluster sampling?

Answer 5

1) This is sampling where you can divide the population into distinct groups before sampling.

Question 6

What is self-selection sampling?

Answer 6

1) This is where people choose to be part of the sample.