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# Data Applied: Correlation

## on Mar 06, 2010

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Data Applied: Correlation

Data Applied: Correlation

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## Data Applied: CorrelationPresentation Transcript

• 5
Data-Applied.com: Correlation
• Correlation
In statistics, correlation and dependence are any of a broad class of statistical relationships between two or more random variables or observed data values
The most familiar measure of dependence between two quantities is the Pearson product-moment correlation coefficient, or "Pearson's correlation."
Data Applied also uses Pearson product-moment correlation coefficient as a measure of correlation
• Pearson product-moment correlation coefficient
It is a value between +1 and −1 inclusive
It is widely used in the sciences as a measure of the strength of linear dependence between two variables
Pearson's correlation coefficient between two variables is defined as the covariance of the two variables divided by the product of their standard deviations:
• Calculation
For a variable Xi where i varies from 1 to N by :
mean (M)= summation (Xi)/N
standard deviation (S) = (summation(Xi-M)^2/N)^(1/2)
Substitute these values and get the correlation
• Correlation using Data Applied’s web interface
• Step 1: Selection of data
• Step 2:Select Correlations
• Step 3: Result
• Visit more self help tutorials
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• The tutorials section is free, self-guiding and will not involve any additional support.
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