## What is considered a good coefficient of variation?

Basically CVgood, 10-20 is good, 20-30 is acceptable, and CV>30 is not acceptable.

### What does coefficient of variance tell you?

The coefficient of variation (CV) is the ratio of the standard deviation to the mean. The higher the coefficient of variation, the greater the level of dispersion around the mean. It is generally expressed as a percentage. The lower the value of the coefficient of variation, the more precise the estimate.

#### What is the best measure of variability?

standard deviation

**Is a standard deviation of 1 high?**

Popular Answers (1) This means that distributions with a coefficient of variation higher than 1 are considered to be high variance whereas those with a CV lower than 1 are considered to be low-variance. Remember, standard deviations aren’t “good” or “bad”. They are indicators of how spread out your data is.

**What is considered a high and 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.

## How do you know if standard deviation is small or large?

The center of the graph is the mean, and the height and width of the graph are determined by the standard deviation. When the standard deviation is small, the curve will be tall and narrow in spread. When the standard deviation is large, the curve will be short and wide in spread.

### What would a small standard deviation indicate?

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.

#### What is standard deviation in test scores?

Standard deviation tells you, on average, how far off most people’s scores were from the average (or mean) score. The SAT standard deviation is 211 points, which means that most people scored within 211 points of the mean score on either side (either above or below it).