Equality correlation method is a statistical measure showing the extent to which the random variable being measured has similarities with the reference variable, where the determination of the correlation index is done by calculating the **Harmony in Gradation** Index of the relationship between the random variable as measured by the reference variable. In this case, an index equal to one represents a perfect similarity between the elements of the variable as measured by the pairs of elements of the reference variable, let R be the reference variable = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11} and Y is random variable measured = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22}, then Y has an equality correlation index equal to one through the relationship function Y = 2R, since all elements of Y are equal to twice of the pairing elements of R.

### Procedure:

- Fill in the size of the measured random variable (Y), which should be the same as the size of the reference variable (R)
- Fill in the value of each element Y and R, make sure there is NO value of an element equal to ZERO; then click CALCULATE

Y (Variable Measured) | R (Reference Variable) |
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#### Calculation Result:

The Population of the Random variable (N): | |

Index of the Perfect Equality Correlation: |

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