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##### Asked by: Almike Palicio

business and finance business operations# What percentage of the data is within 2 standard deviations of the mean?

Last Updated: 29th June, 2020

**68%**ofthe set; while within two standard deviations accountfor about95%; and within three standard deviations account forabout

**99.7%**.

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Hereof, what percentage of the data falls within 2 standard deviation of the mean?

95.4 percent

Secondly, what percent of values lie beyond 2 standard deviations of the mean? 95 percent

In respect to this, what is 2 standard deviations from the mean?

**Standard Deviation**. Specifically, if a set ofdatais normally (randomly, for our purposes) distributed aboutits**mean**, then about **2**/3 of the data values willliewithin 1 **standard deviation** of the **mean** value,andabout 95/100 of the data values will lie within **2standarddeviations** of the **mean** value.

What percent of observations are between the mean and two standard deviations above the mean in a normal distribution?

Regardless of what a **normal distribution**lookslike or how big or small the **standard deviation**is,approximately 68 **percent** of the **observations** (or68**percent** of the area under the **curve**) will alwaysfallwithin **two standard deviations** (one **above** andonebelow) of the **mean**.