You’ll often hear the expression, “This is accurate to plus or minus two standard deviations.” Assuming...

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You’ll often hear the expression, “This is accurate to plus or minus two standard deviations.” Assuming...

You’ll often hear the expression, “This is accurate to plus or minus two standard deviations.” Assuming that the population (or sample) has a normal distribution, what percentage of the population (or sample) is included in the quantity, “Plus or minus two standard deviations”?

math Statistics-And-Probability

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Answer 1

Answer #1

According to empirical rule (68 - 95 - 99.7)

Approximately, 95% of the data falls in 2 standard deviation of the mean.

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Answer 2

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