# Correlation Coefficient Calculator Using Z-score

Instructions: This calculator will compute Pearson's correlation coefficient for two give variables X and Y using the formula that involves z-scores. Please type your X and Y sample data, either in comma or space separated format (For example: "2, 3, 4, 5", or "3 4 5 6 7"), and the solver will show a detailed calculation:

X data (comma separated)
Y data (comma separated)

#### Correlation Coefficient Using Z-scores

Pearson's correlation coefficient can be calculated using different formulas, based on the sample data. One way of doing is taking the sample data $$(X_i)$$ and $$(Y_i)$$ and normalize the scores to the corresponding z-scores $$(Z_i^X)$$ and $$(Z_i^Y)$$ and compute the correlation coefficient using the following formula:

$r =\frac{1}{n} \sum_{i=1}^n Z_i^X Z_i^Y$

You can also compute the coefficient correlation using this calculator.

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