Enter the mean and the coefficient of variation (%) into the QC Range Calculator. The calculator will evaluate the QC Range.

## QC Range Formula

The following two example problems outline the steps and information needed to calculate the QC Range.

QCR = M +/- 2*CVh / 100 * M

Variables:

- QCR is the QC Range ( )
- M is the mean
- CVh is the coefficient of variation (%)

## How to Calculate QC Range?

The following steps outline how to calculate the QC Range.

- First, determine the mean.
- Next, determine the coefficient of variation (%).
- Next, gather the formula from above = QCR = M +/- 2*CVh / 100 * M.
- Finally, calculate the QC Range.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

mean = 30

coefficient of variation (%) = 2.5

QCR = M +/- 2*CVh / 100 * M** **= ?