Sunday, 9 September 2012

The coefficient of correlation, r

  • The Coefficient of Correlation (r) is a measure of the strength of the relationship between two variables. It requires interval or ratio-scaled data (variables). 
  • It can range from -1.00 to 1.00. 
    • Values of -1.00 or 1.00 indicate perfect and strong correlation. 
    • Values close to 0.0 indicate weak correlation. 
    • Negative values indicate an inverse relationship and positive values indicate a direct relationship

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