Covariance Calculator: What It Calculates
Covariance Calculator focuses on a specific mathematical operation or relationship. The output depends on the values, expression, and conventions used in the calculation.
The Formula or Method
Covariance measures how two variables vary together; the population form is Ξ£[(xβΞΌx)(yβΞΌy)]/N.
Sanity check
Estimate the size and sign of the answer before accepting the displayed result. A quick mental check can catch an incorrect input or copied expression.
Using Covariance Calculator
Enter the required numbers or mathematical expression carefully. For formulas involving multiple variables, keep parentheses and signs exactly as intended.
- Identify the variables or values used by the formula.
- Enter them with the correct signs and order.
- Calculate the result.
- Substitute the answer back into the relationship when a verification is practical.
Worked Example
If two variables tend to rise together, their covariance is positive.
Checking the Result
Rounding can slightly change the displayed answer, especially with irrational numbers, logarithms, numerical integration, or repeated operations. Use additional precision when the final result requires it.