Sampling Methods

Question 1

Random Sampling

Answer 1

Use random number generator and pick number assigned

If repeats, pick again

Time consuming for large sample frames

Question 2

Systematic Sampling

Answer 2

Picking data at regular intervals

If there was a fault at every same interval, introduces bias.

Question 3

Stratified Samping

Answer 3

Splitting sample frame into stratas (smaller groups), Then systematically or random sampling.

Strata/ Total Sample x Number of individuals that you want

Expensive and time consuming to split into groups, optimum for picking based on ideal characteristics

Question 4

Quota Sampling

Answer 4

Dividing sample frame into stratas (groups) and then using opportunity sampling (Picking based on convenience until you reached the number of individuals needed known as the quota)

Very biased

Question 5

Sample Frame

Answer 5

List of all members in the population

Question 6

Opportunity Sampling

Answer 6

Picking individuals based on convenie

Biased