Which of the following statements about the normal distribution is CORRECT? A.) Approximately 5% of the observations from a normal distribution lie outside the mean +/- 2SD (2*standard deviation). B.) Approximately 1% of the observations from a normal distribution lie outside the mean +/- 2SD (2*standard deviation). C.) Approximately 2.5% of the observations from a normal distribution lie outside the mean +/- 2SD (2*standard deviation). D.) Approximately 10% of the observations from a normal distribution lie outside the mean +/- 2SD (2*standard deviation).
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In a normal distribution, approximately 68% of the observations lie within one standard deviation of the mean. This means that approximately 34% of the observations lie between the mean and one standard deviation above the mean, and approximately 34% of the Show more…
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