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Coefficient of Variation Ratio (CVR)

The coefficient of variation ratio compares your laboratory precision for a specific test to the CVR of other laboratories performing the same test. Use the following formula to calculate the CVR:

In UnityWeb™, the CVR appears on the following Unity Interlaboratory Reports:

See Also

Useful Statistics


Standard Deviation (SD)

Calculating a Control Mean and Range

Standard Deviation Index (SDI)


Coefficient of Variation (CV)

Determining an Acceptable CV

Total Error (TE) and Total Allowable Error (TEa)