sampling methods Flashcards
1
Q
TYPES of SAMPLING
A
- random
- opportunity
- systematic
- stratified
- self-selected
2
Q
RANDOM SAMPLING
A
EVERYONE in the POPULATION has an EQUAL CHANCE of being studied
(+) UNBIASED
(-) takes a LONG TIME
3
Q
OPPORTUNITY SAMPLING
A
RECRUITING PPL who are MOST CONVENIENT
(+) EASY + QUICK
(-) BIASED, not representative
4
Q
SYSTEMATIC SAMPLING
A
EVERY nth PERSON is CHOSEN eg every 3rd person
(+) UNBIASED, objective system
(-) NOT TRULY UNBIASED, unless you select number using LOTTERY METHOD
5
Q
STRATIFIED SAMPLING
A
DIVIDING the population into SUBGROUPS then SELECTING a SAMPLE from each
(+) REPRESENTATIVE of a TARGET POPULATION
(-) TIME CONSUMING to IDENTIFY SUB-GROUPS
6
Q
SELF-SELECTED SAMPLING
A
ADVERTISE for VOLUNTEERS
(+) ACCESS to VARIETY of POPULATION, MORE REPRESENTATIVE + LESS BIASED
(-) VOLUNTEER BIAS
