# How do you find the range and standard deviation?

## How do you find the range and standard deviation?

When time is short and you just want a rough estimate of the **standard deviation**, turn to the **range** rule to quickly estimate the **standard deviation** value. The **standard deviation** is approximately equal to the **range** of the data divided by 4. That's it, simple.

## What is considered a low standard deviation?

**Low standard deviation** means data are clustered around the mean, and high **standard deviation** indicates data are more spread out. A **standard deviation** close to zero indicates that data points are close to the mean, whereas a high or **low standard deviation** indicates data points are respectively above or below the mean.

## Is one standard deviation significant?

**One standard deviation**, or **one** sigma, plotted above or below the average value on that normal distribution curve, would define a region that includes 68 percent of all the data points. Two sigmas above or below would include about 95 percent of the data, and three sigmas would include 99.

## Is range greater than standard deviation?

The smaller your **range** or **standard deviation**, the lower and better your variability is for further analysis. The **range** is useful, but the **standard deviation** is considered the more reliable and useful measure for statistical analyses. In any case, both are necessary for truly understanding patterns in your data.

#### Read also

- How do you calculate confidence interval from standard deviation?
- What is a high RSD?
- Are standard deviation units squared?
- How do you find variance from standard deviation?
- How do you do standard deviation error bars in Excel?
- What is the Sigma in standard deviation?
- What is standard deviation of error?
- Is standard error and deviation the same?
- How do you create a standard deviation table?
- What is the standard deviation of a uniform distribution?

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