Question

4 and 5, please and thank you :)

4. When you have to find out information about a very large population and cannot count every member of that population what statistical methodology is used? 5. Why is it important that a sample should be representative of a larger population and that each member in the sample has an equal chance of being selected?

Answer 1

4. When we have to find out information of a very large population the statistical methodology that is used is sampling which carried out by several methods. After sampling is done we carry out designs of sample survey to find out information of the large population.

5.It is important that a sample should be representative of a larger population beacuse if each member would not have probabilty of getting selected there is no point of getting a good population estimator which will provide correct information regarding the larger population. If a sample is a representative of the population then it would posses all the qualities of the population which help us to find a good population estimator.On the other hand we select sample as the reresentative of the larger population because it costly, time consuming ,labour consuming to deal with the larger population.

And every member of the sample has equal chance of selected beacuse they are identical in nature posses same quality.