<prompt> True about simple randomization isEvery person has an equal chance of selectionLess number of samples are obtainedAlso known as systemic randomisationGroups are not equally distributed  <response>: Ans. is a Every person has an equal chance of selection Simple random sampling :Its done by assigning no. to each units and then selecting them randomly using a table of random numbers.with this procedure the sample is drawn in such a way that each unit has an equal chance of being drawn in sample.This technique provides the greatest number of possible samples not lessSimple randomization is not same as systemic random samplingSystemic random sampling: Its done by picking every 5th or 10th unit at regular intervals.Stratified random sample : The sample is drawn in such a systemic way so that each position of the sample represents a corresponding strata of the universe. 