THE SAMPLING PROCESS
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Factors affecting sample size
The research objective
The extent of precision desired
The acceptable risk in predicting that lvlof precision
The amount of variability in the population itself
The cost & time constraints
The size of population

Types Sampling Design
Probability
Element in the population have someknown,non-zero chance or probability ofbeing selected as sample subjects.
Use when Representativeness of the sample isof importance in the interests of widergeneralizability.
Non-Probability
Element do not have known or predeterminedchance of being selected as subjects
Used when time or other factors, rather thangeneralizability become critical.

Meaning
Is a (physical) representation of allelements in the population fromwhich sample is drawn

Meaning
The target population must be defined in termsof elements, geographical boundaries, & time
Example
Expatriate in Klang Valley Hotel
Reading habits of elderly target population is ppl aged 50 and over
Important
Illustrate that the research objective & thescope of the study