sampling

Question 1

what is target population

Answer 1

a group of individuals that the researcher is interested in

Question 2

what is a sampling frame

Answer 2

list of everyone in the target population from which the sample is drawn

Question 3

random sampling

Answer 3

every individual has equal opportunity of selection this can be done on a random number generator

Question 4

self selected (volunteer)

Answer 4

participants from target population select themselves

Question 5

opportunity

Answer 5

uses participant from the target population who are available at the time

Question 6

snowballing

Answer 6

participants recruit there friends family ect

Question 7

stratified

Answer 7

population is divided into categories called strata the size of the strata in our population is proportional to the size of the strata in sample the people in each strata is randomly chosen eg 46% female population so in a sample 46% are female

Question 8

Quota

Answer 8

the people representing each strata is not randomly chosen

Question 9

systemic

Answer 9

predetermined system of selection for participants eg selecting every 3rd person to answer the phone

Question 10

advantages of random sampling

Answer 10

simple method
data analysis is simple
most standard statistical techniques

Question 11

disadvantages of random sampling

Answer 11

population is heterogenous the results can vary
may difficult to do dispersed populations

Question 12

self selected (volunteer) advantages

Answer 12

all participants are willing to be involved
sampling frame not needed
quick and easy to do

Question 13

self selected disadvantages

Answer 13

sample bias not representative
so no conclusion can be drawn

Question 14

opportunities advantages

Answer 14

quick and easy to do sampling frame not needed

Question 15

opportunities disadvantages

Answer 15

high chance that the sample will be biased leading to low population validity

Question 16

snowballing advantages

Answer 16

allows the researcher to test participants which may be difficult to assess
low seaech costs

Question 17

snowballing disadvantages

Answer 17

this research is prone to bias because researchers are only in contact with a small number of population

Question 18

stratified advantages

Answer 18

population is diverse it giving a more realistic picture than random sampling
representation of minority strata

Question 19

stratified disadvantages

Answer 19

detailed information about population is required to define the strata
crucial to choose correct stratification according to factors that affect the investigation this may need to be redefined during the investigation