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## Guide to Excel: How to Compute Correlation Coefficient

The correlation coefficient is a statistical metric designed to gauge the strength of the relationship between two variables, with values ranging from -1.0 to 1.0. A score of -1.0 denotes a perfect negative correlation, indicating that as one variable increases, the other decreases. Conversely, a score of 1.0 signifies a perfect positive correlation, implying that both variables move in the same direction. A score of 0.0 denotes no correlation between the two variables.

#### Calculating the Correlation Coefficient Using Excel

There are two methods to compute the correlation coefficient in Excel. The first method involves utilizing the CORREL function, while the second method employs the Data Analysis tool.

### Utilizing the CORREL Function

The CORREL function computes the correlation coefficient for two data sets. The syntax for the function is CORREL(array1, array2), where array1 represents the first set of data, and array2 represents the second set of data. The data can be in the form of a cell range or an array constant.

#### Using the Data Analysis Tool

The Data Analysis tool provides another approach to calculate the correlation coefficient for two or more data sets. Follow these steps:

1. Select the data for analysis.
2. Navigate to the Data tab.
3. Click on Data Analysis.
4. Choose Correlation from the list of statistical tools.
5. Click OK.
6. In the Input Range box, input the range of cells containing the data. If your data includes headers, check the Labels in First Row box.
7. In the Output Range box, specify the cell for the output.
8. Click OK.