samples

Question 1

TYPES of SAMPLING

Answer 1

• random
• opportunity
• systematic
• stratified
• self-selected

Question 2

RANDOM SAMPLING

Answer 2

EVERYONE in the POPULATION has an EQUAL CHANCE of being studied
(+) UNBIASED
(-) takes a LONG TIME

Question 3

OPPORTUNITY SAMPLING

Answer 3

RECRUITING PPL who are MOST CONVENIENT

(+) EASY + QUICK

(-) BIASED, not representative

Question 4

SYSTEMATIC SAMPLING

Answer 4

EVERY nth PERSON is CHOSEN eg every 3rd person

(+) UNBIASED, objective system
(-) NOT TRULY UNBIASED, unless you select number using LOTTERY METHOD

Question 5

STRATIFIED SAMPLING

Answer 5

DIVIDING the population into SUBGROUPS then SELECTING a SAMPLE from each

(+) REPRESENTATIVE of a TARGET POPULATION

(-) TIME CONSUMING to IDENTIFY SUB-GROUPS

Question 6

SELF-SELECTED SAMPLING

Answer 6

ADVERTISE for VOLUNTEERS

(+) ACCESS to VARIETY of POPULATION, MORE REPRESENTATIVE + LESS BIASED
(-) VOLUNTEER BIAS