13) Randomization, blocking, and repetition are important factors that can increase the reliability of data collection...

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13) Randomization, blocking, and repetition are important factors that can increase the reliability of data collection through experiments when studying the influence of variables. Please explain this in more detail. 13) Randomization, blocking, and repetition are important factors that can increase the reliability of data collection through experiments when studying the influence of variables. Please explain this in more detail.