Which of the following is true for normal distributions? Around 30% of the scores will be located within +/- one standard deviation of the mean. Around 50% of the scores will be located within +/- one standard deviation of the mean. Around 70% of the scores will be located within +/- one standard deviation of the mean. Around 90% of the scores will be located within +/- one standard deviation of the mean. QUESTION 4 Which of the following best describes what the standard error of the mean represents?

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