What is the rate of change?
1 answer:
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Since 
is 2 standard deviations above the mean, you're looking for the probability that
The empirical rule says that approximately 95% of a normal distribution lies within 2 standard deviations of the mean, or
.
Since the normal distribution is symmetric, you have
The empirical rule says that approximately 95% of a normal distribution lies within 2 standard deviations of the mean, or
Since the normal distribution is symmetric, you have