Answer to Question #105685 in Statistics and Probability for suresh

Question

Some of the reasons why a sample is considered instead of the entire population

A> Too time consuming
B> Too expensive
C> Not feasible
D> All of the above
E> 1 and 2 only

Answer 1

It is more difficult to get an accurate population where as a sample is smaller and easier to assess.

Sometimes "measuring" or "testing" something destroys it. 

Not all units in the population can be identified, such as all the air molecules in the atmosphere. So to measure air pollution, you take a sample of air molecules. Also, even if all those air molecules could be identified, it would be too expensive and too time consuming to measure them all.

D) All of the above