identify two methods for obtaining a simple random sample id

Solution

there are many ways to get a simple random sample. One way is to assign a number to each element of population, starting from 1 to N. After this, a random number generator can be used to randomly select one number between 1 and N. We can continue selecting elements using random number generator, omitting repeats so that selected elements are not repeated. This is called sampling without replacement.

Alternately, we can also sample with replacement, where dont omit repeated elements.