Sampling Techniques

Question 1

– the process of choosing a representative portion of a population

Answer 1

Sampling

Question 2

universe; the entire group or set of individuals or items which is the focus of an investigation

Answer 2

Population

Question 3

group or set about which generalization will be made

Answer 3

• TOPIC POPULATION

Question 4

group or set of individuals who furnish the needed info; who answers

Answer 4

• RESPONDENT POPULATION

Question 5

– set of individuals which information is originally desired

Answer 5

• TARGET POPULATION

Question 6

a subset or portion of population

Answer 6

• SAMPLE

Question 7

one of the units selected for the purpose of sampling

Answer 7

• SAMPLING UNIT

Question 8

to an orderly and complete list of sampling units

Answer 8

• SAMPLING FRAME

Question 9

definite plan for obtaining a sample from a given population

Answer 9

• SAMPLING DESIGN

Question 10

• each unit of the population has known probability of being selected or included in the sample

Answer 10

PROBABILITY SAMPLING

Question 11

– basic and best-known probability sampling; gives each unit in the population an equal probability

Answer 11

• Simple random sampling

Question 12

modified version of simple random sampling; less time consuming & easier to implement; total number of units divided by desired sample size, yielding a sampling interval

Answer 12

• Systematic sampling

Question 13

separating the population units into non-overlapping groups determined by certain characteristics

Answer 13

• Stratified sampling

Question 14

an area sampling because it is frequently applied on a geographical basis

Answer 14

• Cluster sampling

Question 15

several stages or phases in drawing; population are grouped into hierarchy of units and sampling is done successively

Answer 15

• Multi-stage sampling

Question 16

• each unit of the population will be selected is not known, nor is there any assurance that every unit has some chance of being included

Answer 16

NON-PROBABILITY SAMPLING

Question 17

judgemental sampling, uses good judgement in selecting respondents who best meet the purpose of the study

Answer 17

• Purposive sampling

Question 18

accidental sampling; take the closest persons/convenient

Answer 18

• Convenience sampling

Question 19

non-probability sampling equivalent of stratified sampling; added requirement that each stratum or group is generally represented in the sample

Answer 19

• Quota sampling

Question 20

• by referral; requires identification of a few persons who met requisite characteristics important to the study; person acts as informants to identify others

Answer 20

• Snowball sampling

Question 21

• multi - method, multi-trait and triangulation; difficult to apply

Answer 21

MIXED-METHODS SAMPLING

Question 21

• multi - method, multi-trait and triangulation; difficult to apply

Answer 21

MIXED-METHODS SAMPLING

Question 22

utilizes telephone numbers as sampling units; dominant survey methodology since the 1980s

Answer 22

• Telephone-Based sampling

Question 23

email ad, website visits, & recruited users of the internet are utilized as sampling units
• List-based; sampling of website visits & sampling from recruited panels of potential participants

Answer 23

• Web-based

Question 24

postal addresses are utilized as sampling units; used mostly in national surveys

Answer 24

• Address-based

Question 25

• Units of time (may vary) are used as sampling units; studying repeated outcomes that vary a great deal over time

Answer 25

• Time-based

Question 26

– area, spatial, location-based, venue-based & facility-based sampling; utilize space as a sampling unit

Answer 26

• Space-based