Question

Give one example of a sample/population. this can be any group of people. simply explain whwt type of sample would be needed to address that population. you can choose a city if you wish. you will need to state briefly what you might be testing.

Answer 1

Suppose we are interested to study the height of the students (in cm) of class 7 of West Bengal. Thus our population is all the students of class 7 of West Bengal.

Let the entire population of students of class 7 of West Bengal be divided into some strata depending upon the economic conditions of the places, i.e. per capita income ,say. This is done because height somewhat depends on the food habits of a child, which in turn depends on the economic conditions of his/her family.

Now a simple random sample is drawn from each stratum without replacement. Thus the samples,so obtained. ideally represent the population as a whole. The heights of the students of class 7 of West Bengal can be thus measured easily with the help of stratified sampling from the population.

In case of any query, do comment. Hope this will help you. Thanks