Sampling technique :

– Sample is a smaller collection of units from a population used to determine truths about the population.

– Smaller representative of  the total entity.

 

Optimum sample is the one that has :

a) Efficiency

b) Representativeness

c) Reliability

d) Flexibility

 

 

Sample Survey	Census Survey
a) Only few units of population is  studied.	a) Study of whole population.
b) Information collected at any time according to interest of researcher.	b) Periodic collection of information.
c) require relatively less amount of  money and time.	c) Require large  amount if money , time and labor.
d) Less reliable result.	d) More reliable result.
e) Chances of error is more.	e) Chances of error is less.

 

 

Sampling frame :

– Source material from which sample is drawn.

 

Universe :

– Total population from which sample is taken.

– It is two types :-finite and infinite.

 

Characteristics of good sample:

a) True representative.

b) have small sampling error.

c) Must be viable in context of fund.

d) Sample result must co-incide with universe result.