NORMAL DISTRIBUTION N( , )

2 standard deviation. of the . mean (between ( + 2 and ( – 2). 99.7%. of data falls within . 3 standard deviation. of the . mean (between ( + 3 and ( – 3). Since the bell curve for normal distribution is symmetrical about the mean, we can use the 68-95-99 rule to determine the probabilities of the individual sections under the curve. ................
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