POPULATION/SAMPLE Flashcards
POPULATION
ENTIRE GROUP OF RESEARCH INTEREST
SAMPLE
PART OF THE POPULATION THAT IS SELECTED FOR RESEARCH PURPOSES (THOSE WHO PARTICIPATED IN THE STUDY)
RANDOM SAMPLING
ENSURES ALL MEMBERS OF THE POPULATION OF RESEARCH INTEREST HAS AN EQUAL CHANCE OF BEING SELECTED TO BE PART OF THE SAMPLE
(DRAWN FROM HAT OR WHEEL)
ADV AND LIMITATION OF RANDOM SAMPLING
ADV: FREE FROM RESEARCHER BIAS
LIM:
STRATIFIED SAMPLING:
RESEARCHERS DIVIDING SAMPLED GROUPS BASED ON CHARACTERISTICS THEY SHARE
ADV AND LIMITATION OF STRATIFIED SAMPLING:
ADV: ENABLES RESEARCHER TO SAMPLE SPECIFIC GROUPS
LIM: TIME-CONSUMING (EXPENSIVE PROCEDURE)
CONVENIENCE SAMPLING:
COMMONLY USED BIASED SAMPLE
(asking ppl to volunteer via news papaer article, Selecting people who walk past you in the school yard, Choosing participants because they are family, friends or classmates.
RANDOM ALLOCATION
PROCEDURE TO RANDOMLY ALLOCATE PARTICIPANTS INTO GROUPS
(TOSS A COIN, NAMES OUT OF A BOX)