Sampling

• Refers to process of drawing out sample that will adequately justifies or represent the characteristics of entire population.
• The features of sampling include the following:

i. Representativeness

ii. Independent

iii. Adequacy

iv. Unambiguous (clear) and definite

v. Represent different areas of universe

Aims of sampling

a) Reduce cost of research

b) generalize about a larger population

c) In some cases, analysis may be destructive. So, sampling is needed.

Factors affecting sample size

• Types of analysis to be employed.
• The level of precision needed.
• Population homogeneity/ heterogeneity
• Available resources
• Sampling technique used