This is because a given sample size provides proportionately more information for a small population than for a large population. The first four basic factors above constitute the primitive inputs required to determine the fifth. Slovins Formula used to calculate the sample size n given the population size N and a margin of error e it is a random sampling technique formula to estimate sampling size FORMULA LEGEND N total population n no.
Where n is the sample size N is the population size and e is the level of precision.
In the formula for sample size n is a function of and that is to say given the values of these four factors the value of nis determined. Consider the example problem. 258 2 05 1-05 001 2 665605 0500001 16641 The sample size for the chosen parameters should be 16641 which is a very large sample. - its a random sampling technique formula to estimate sampling size -It is computed as n N 1Ne2.