Calculate Karl Pearson's coefficient of correlation from the following data and interpret its value : The coefficient of correlation is said to be a measure of covariance between two series. The covariance of two series X and Y is written as : Σχυ N Covariance where x and y stand for deviations of X and Y series from their respective means. In order to find out the value of correlation coefficient, first we calculate covariance and then in order to convert it to a relative measure we divide the covariance by the standard deviation of the two series. The ratio so obtained is called Karl Pearson's coefficient E xy 2 Ex1 Ey * r =: Ox = Oy = %3D N N E xy E xy Ex Ey Συ VE X x E y NV N N

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