Question

When a group of units representing all units of population is investigated

Answer 1

Answer:

ok

Explanation:

Sample of survey

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Answer 2

In Statistics,when the target population of the study or research is divided into sub units or group of units to avoid practical inconveniences of statistical research,it is called "sample".

Explanation:

Sampling is a common process in Statistics,which involves dividing the target population of study into particular group of units or sub units in order to eliminate the practical constraints of conducting statistical research.These constraints commonly include the difficulties of covering the entire target population for the study and mainly time and monetary constraints.In many studies,it is almost impossible to fully cover the target population for research purposes if the population size is considerably large.It would require a great deal of practical effort and monetary resources to access or reach them.Hence,sampling is a much better and practical statistical method of conducting field based statistical study or research.