According to the empirical rule, approximately what percentage of normally distr

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According to the empirical rule, approximately what percentage of normally distributed data

lies within one standard deviation of the mean?

a) 59%

b) 68%

c) 72%

d) 95%

e) 99.7%

Aug 18th, 2015

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 The empirical rule 

The empirical rule states that for a normal distribution, nearly all of the data will fall within three Standard deviations of the mean. The empirical rule can be broken down into three parts:

  • 68% of data falls within the first standard deviation from the mean.
  • 95% fall within two standard deviations.
  • 99.7% fall within three standard deviations.

The rule is also called the( 68-95-999)Its also called the Three Sigma Rule.

The correct answer is 68%


Please let me know if you need any clarification. I'm always happy to answer your questions.
Aug 18th, 2015

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