1) Samples

Question 1

Opportunity Sample Evaluation

Answer 1

.Available at the time
+ Quick and easy / saves time and money
- Bias and not generalisable of entire population

Question 2

Self Selected Evaluation

Answer 2

. Asks for volunteers
+ Participants are willing = increases validity as they will want to complete it properly
- Atypical = volunteer bias and likely to be keen and act more helpful than normal ppl

Question 3

Random Evaluation

Answer 3

.Every member has an equal chance of being selected
+No bias = more representative
- Time consuming

Question 4

Systematic Evaluation

Answer 4

.Selects every nth person
+ Low bias as it uses objective system = more representative
- Not completely unbiased unless you use a random number generator = less representative

Question 5

Snowball Evacuation

Answer 5

.current participants recruit more participants from ppl they know
+good for locating groups that are hard to access = more representative if large sample is gained
-likely to not be good cross section as its friends of friends