Suppose, if we want to select the required number of samples from a population of size N(< ) then any two digit random number can be selected from ( to ) from the above random number table. Similarly if N(< ) or (< ), then any three digit random number or four digit random number can be selected from ( to ) or ( to ). The procedure of selecting the random samples consists of following steps: . Identify the N units in the population with the numbers from to N.
. Select at random, any page from the ‘Random Number Table’. . Select the required number of samples from any row or column or diagonal.
a possibility of selecting the same sample any number of times. So, simple random sampling without replacement is followed. Thus in simple random sampling from a population of N units, the probability of drawing any unit at the first draw is N , the probability of drawing any unit in the second draw from among the available N −