delineate the population to be studied

8/4/2019 Delineate the Population to Be Studied

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POPULATION:

refers to the largest body of the case

or individuals being researched thatconform to a specific set ofparticular or eligibility criteria

SAMPLING:

Process of selecting a portion of thepopulation to represent the entirepopulation.


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POPULA-TION

ACCESSIBILITY

OF SAMPLEPARTICIPANTS

AMOU

NTOF

TI

ME

AVAILABLE

COST


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1. PROBABILITY SAMPLING

a. Simple random sampling

-Selection of the sample is done bychance.

- Lottery draw or a table of randomnumbers


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b. Stratified random sampling

- Population is subdivided into areas,

sections then random samples are takenfrom each

- example. Divide the students into year

levels: 2st year, 2nd year, 3rd yr , 4th yr andget random samples from each level.


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c. Systematic sampling

-consists of taking every nth person in a

school, community or telephone

directory.

Example. In a study of the health problemsin the community, the researcher may

decide to study every 5th family in a

barangay?


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d. Cluster sampling

-A small sample is taken from various

sections of the total population

Example. In studying the attitudes ofnurses in Baguio city towards work, asmall sample from each hospital will betaken.


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2. NON-PROBABILITY SAMPLINGa. Convenience or accidental

sampling

-data are collected from anyone most

conveniently available

- such as people on street corner or ina hospital or class


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b. Snowball or network sampling

- Kind of convenience sampling that

involves subjects suggestions or referring

other subjects who meet the researchers

eligibility criteria


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c. Judgmental or Purposive sampling

- Selects and Study a specific number

group that represents the targetpopulation with regards to certaincharacteristics such as age, sex, oreconomic status

- Tapping deans of college of nursing fornursing education studies


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d. Cross-cultural sampling

- Study is conducted in a variety of

cultural settings

- Example. Gathering samples from

Tagalogs, Ilocanos, Visayans,Bicolanos


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e. Longitudinal sampling

- A given group subject are studies for anextended period of time- retrospective/

prospective

-retrospective: growth of newborn twoyears ago to the present

Prospective: mastectomy patients arestudied from operation to 3 years after

discharge.


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f. Cross sectional sampling

- Subjects are observed at only one

point in time

- Asking high school students their

choice of career after graduation


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g. Quota sampling

- Researcher identifies the strata of

the population & determines the

proportion of elements needed in the

various segments of the population

delineate the population to be studied

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