Research methods

I t l d t

Data sourceSecondary source -> Secondary data

i i d

Internal dataExternal data

Primary source -> Primary data

ObservationData

ObservationExperiment

collectionp

Survey

Random sampling

Probability sampling

Systematic sampling

Sampling

samplingStratified sampling

Sampling

Non-probabilityConvenience sampling

Non probability sampling Judgmental sampling

Quota sampling

A h

-By post-TelephonePersonal inter ie

Survey Approach -Personal interview

dmethods Questionnaire- Unstructured- Structured

Administration- In-house- Agency(Outsourced)

Ad hocSurvey frequency

Continuous