## Can the coefficient of variation be negative?

The coefficient of variation divides by the mean rather than the absolute value of the mean. If the mean is negative, the coefficient of variation will be negative while the relative standard deviation (as defined here) will always be positive.

**Does CV measure accuracy or precision?**

Using the CV makes it easier to compare the overall precision of two analytical systems. The CV is a more accurate comparison than the standard deviation as the standard deviation typically increases as the concentration of the analyte increases.

**What is the difference between CV and RSD?**

All Answers (8) In some cases, the coefficient of variation and the RSD are the same thing. This is because the two formulas differ in a minor way: the Coefficient of Variation divides by the mean while the RSD divides by the absolute value of the mean.

### What is difference between mean median and mode?

The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set. The median is the middle value when a data set is ordered from least to greatest. The mode is the number that occurs most often in a data set.

**Which is better mean and median?**

Unlike the mean, the median value doesn’t depend on all the values in the dataset. Consequently, when some of the values are more extreme, the effect on the median is smaller. When you have a skewed distribution, the median is a better measure of central tendency than the mean.

**What is difference between mean and mode?**

The mean is the average of a data set. The mode is the most common number in a data set. The median is the middle of the set of numbers.