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.

1. First, determine the mean.
2. Next, determine the coefficient of variation (%).
3. Next, gather the formula from above = QCR = M +/- 2*CVh / 100 * M.
4. Finally, calculate the QC Range.
5. 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 = ?