The area above the x -axis and under the curve must equal one, with the area under the curve representing the probability. ... Since the standard deviation is 1, this represents the probability that a normal distribution is between 2 standard deviations away from the mean.
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Answer:
The area above the x -axis and under the curve must equal one, with the area under the curve representing the probability. ... Since the standard deviation is 1, this represents the probability that a normal distribution is between 2 standard deviations away from the mean.