Question

Where a blind folded selection has been made from the number of slips based on the requirements, it is called as ______  method of random sampling
1. Sequential list
2. Grid system
3. Random number
4. Lottery

Answer 1

Correct Answer - Option 4 : Lottery

Where a blind folded selection has been made from the number of slips based on the requirements, it is called as Lottery method of random sampling.

Lottery method of random sampling:

• This is a very popular method of taking a random sample. Under this method, all items of the universe are numbered or named on separate slips of paper of identical size and shape.
• These slips are then folded and mixed up in a container or drum. A blindfold selection is then made of the number of slips required to constitute the desired sample size. The selection of items thus depends entirely on chance.
• The method would be quite clear with the help of an example. If we want to take a sample of 10 persons out of a population of 100, the procedure is to write the names of all the 100 persons on separate slips of paper, fold these slips, mix them thoroughly and then make a blindfold selection of 10 slips.

• However, while adopting lottery method it is absolutely essential to see that the slips are of identical size, shape and colour, otherwise there is a lot of possibility of personal prejudice and bias affecting the results.