Sampling in Epidemiology

by lottery method units are selected in
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In a sample survey, the sample of units to be enumerated must be selected using strict statistical procedures A method known as random sampling is used Random

Lottery Method

by lottery method units are selected Each unit has an equal chance of being drawn in the sample For ensuring that the Numbers are Chosen Randomly, one can use a random number table, Lottery method

bygholm slot In this method, the subjects are selected by the choice of the investigators The researcher assumes specific characteristics for the sample ( male