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Which of the following is not a valid reason for using random selection of the sample in a well-designed survey?
Random selection ensures that each member of the population has an equal chance to be selected for the sample.
Random selection makes it likely that the sample will be representative of the population of interest.
Random selection greatly reduces bias in the sample statistic.
Random selection of subjects will allow the researchers to determine a causal relationship.
Random selection of subjects will allow the researchers to generalize their findings to the population of interest.