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Unformatted text preview: of finite
number of units. Number of workers in a factory, production of
articles in a particular day for a company are examples of finite
population. The total number of units in a population is called
population size. A population is said to be infinite if it has infinite
number of units. For example the number of stars in the sky, the
number of people seeing the Television programmes etc.,
11 2.2.2 Census Method:
Information on population can be collected in two ways –
census method and sample method. In census method every
element of the population is included in the investigation. For
example, if we study the average annual income of the families of a
particular village or area, and if there are 1000 families in that area,
we must study the income of all 1000 families. In this method no
family is left out, as each family is a unit.
Population census of India:
The population census of our country is taken at 10 yearly
intervals. The latest census was taken in 2001. The first census was
taken in 1871 – 72.
[Latest population census of India is included at the end of the
2.2.3 Merits and limitations of Census method:
1. The data are collected from each and every item of the
2. The results are more accurate and reliable, because every
item of the universe is required.
3. Intensive study is possible.
4. The data collected may be used for various surveys,
1. It requires a large number of enumerators and it is a
It requires more money, labour, time energy etc.
It is not possible in some circumstances where the
universe is infinite.
The theory of sampling has been developed recently but this
is not new. In our everyday life we have been using sampling
theory as we have discussed in introduction. In all those cases we
believe that the samples give a correct idea about the population.
Most of our decisions are based on the examination of a few items
that is sample studies.
12 2.3.1 Sample:
Statisticians use the word sample to describe a porti...
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This note was uploaded on 01/18/2014 for the course BUS 100 taught by Professor Moshiri during the Winter '08 term at UC Riverside.
- Winter '08