representative sampling methods

Question 1

what is random sampling?

Answer 1

-equal chance of being chosen
-lottery method/computer randomiser

Question 2

what are adv of random and disadv?

Answer 2

ad:
-no bias
-researcher has no infulence
dis:
-not very representative

Question 3

what is QUASI/SYSTEMATIC?

Answer 3

-every nth person chosen from the list

Question 4

adv and disadv of quasi/systematic?

Answer 4

ad:
-no bias
disadv:
- not very represenataive, may choose same gender or ages

Question 5

what is stratified?

Answer 5

-sampling frame divided into different smaller frames
-proportions chosen from each one matches target pop
-names chosen at random

Question 6

adv and disadv of stratified?

Answer 6

ad:
-most representaive method
disadv:
-info you need may not be available/accessible

Question 7

whats quota sampling?

Answer 7

-ensure certain grps are in one sample
-decide how many grps you want in each category
-physically go out and approach them

Question 8

dis and adv of quota sampling?

Answer 8

adv:
-useful way to gather a represetative sample
-used when no sample frame available
dis:
- some bias can occur; approach those who look most friendly