# How do you use the 68 95 and 99.7 rule?

## How do you use the 68 95 and 99.7 rule?

The **7 Rule** tells us that **68**% of the weights should be within 1 standard deviation either side of the mean. 1 standard deviation above (given in the answer to question 2) is 72.

## Is standard deviation always 1?

The **standard deviation** of the z-scores is **always 1**. The graph of the z-score distribution **always** has the same shape as the original distribution of sample values. The sum of the squared z-scores is **always** equal to the number of z-score values.

## What's considered a low standard deviation?

A **low standard deviation** indicates that the values tend to be close to the mean (also called the expected value) of the set, while a high **standard deviation** indicates that the values are spread out over a wider range. ... It is algebraically simpler, though in practice less robust, than the average absolute **deviation**.

## Do you want a low standard deviation?

A **low standard deviation** means that the data is very closely related to the average, thus very reliable. A high **standard deviation** means that there is a large variance between the data and the statistical average, and is not as reliable.

## How do you trade standard deviation?

If prices **trade** in a narrow **trading** range, the **standard deviation** will return a low value that indicates low volatility. Conversely, if prices swing wildly up and down, then **standard deviation** returns a high value that indicates high volatility.

## Is volatility the standard deviation?

**Volatility** is a statistical measure of the dispersion of returns for a given security or market index. In most cases, the higher the **volatility**, the riskier the security. **Volatility** is often measured as either the **standard deviation** or variance between returns from that same security or market index.

#### Read also

- How many standard deviations is 99th percentile?
- How do you find the range and standard deviation?
- 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?

#### You will be interested

- What are stick noodles?
- How do you create a standard deviation table?
- How does Standard Deviation affect normal curve?
- Can you calculate standard deviation from the mean?
- How do I get the standard deviation symbol in Word?
- How do standard deviations relate to z-scores?
- Can there be a standard deviation of 0?
- What if the standard deviation is 0?
- Is standard deviation expressed in units?
- What is the symbol for standard deviation called?