UNIT-I INTRODUCTION TO SAMPLE SURVEYS The main objective

by lottery method units are selected in
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1 - Lottery method 2- Computer generated random sampling 3- Random number Within selected clusters, all units households included (or random

These are Lottery method, Tippet's number method and Computer based generation of random numbers Probabilistic, because the first unit is selected at random

by lottery method units are selected in These discs are placed in a container and after through shuffling sample units are selected by simple lottery method It is usually done with the help of

by lottery method units are selected Lottery Method: Thus, in systematic sampling only the first unit is selected randomly and the remaining units of the sample are selected at fixed intervals