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MB0050 Q 3. A. Differentiate between ‘Census survey’ and ‘ Sample Survey’.

Answer: a. A part of the population is known as sample. The method consisting of the selecting for study, a portion of the ‘universe’ with a view to draw conclusions about the ‘universe’ or ‘population’ is known as sampling. A statistical sample ideally purports to be a miniature model or replica of the collectivity or the population constituted of all the items that the study should principally encompass, that is, the items which
potentially hold promise of affording information relevant to the purpose of a given research. Sampling helps in time and cost saving. It also helps in checking their accuracy. But on the other hand it demands exercise of great care caution; otherwise the results obtained may be incorrect or misleading.

Sampling is opted when the amount of money budgeted is smaller than the anticipated cost of census survey.

The decision regarding census or sampling depends upon the budget of the study. Sampling is opted when the amount of money budgeted is smaller than the anticipated cost of census survey. The extent of facilities available – staff, access to computer facility and accessibility to population elements - is another factor to be considered in deciding to sample or not. In the case of a homogenous population, even a simple random sampling will give a representative sample. If the population is heterogeneous, stratified random sampling is appropriate.

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