How to interpret the Pearson Correlation Index?

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The Pearson Correlation Index, calculated using Excel's "correl" command, ranges from 0 to 1 and indicates the relationship between two variables. A value close to 1 signifies a strong positive correlation, while a value close to -1 indicates a strong negative correlation. This index reflects how often the variables move in the same or opposite directions. It serves as a sufficient indicator of dependence, though not a necessary one. Understanding this correlation is crucial for analyzing data relationships effectively.
24forChromium
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Not sure if that's the technical name, but I refer the the number Excel give you between 0 and 1 when you use the "correl" command on two sets of numbers.
 
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It is an indicator of the tendencies of the two variables to move in the same direction, and a sufficient, but not necessary, indicator of dependence. The closer its absolute value is to 1, the stronger the indication of dependence. If the number is positive (negative) it indicates a how often the variables move in parallel (opposite) directions.
 
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