Population vs sample in statistics are plays two different role in statistics. Population is the whole study area where sample is the required study area from the whole study area.
|Population vs Sample-statistical aid|
Population vs sample
Population indicates the all data or whole observations under a particular study area or a study variable. That means , a set of similar items or events or data is defined by population.
If we choose a particular area or subject for our study or research purpose , then we have to collect all the information related to that subject or area. Here all the collected information is our population.
That means ,
Suppose , we want to study about educational qualification of Bangladeshi people. so here all the Bangladeshi people is our population under our study variable educational qualification.
A representative part of population is defined by sample. That means , a sample is a subset of population which contains all the feature or attributes of population.For above example we can say ,
population = all Bangladeshi people
sample=peoples of Khulna divisionBecause , Khulna division included in Bangladesh & people of Khulna division is also exist in Bangladesh.
Statistic: characteristics or function of sample is defined by statistic and where the function is independent. sometimes , it is defined by the value of that function .
let we have 5 sample(20,21,23,25,23) which indicates the age (in year) of 5 students of a college.
then we want to calculate the arithmetic mean for this sample,so, A.M=(20+21+23+25+23)/5
here A.M or sample mean is called statistic.
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