The correlation coefficient between daily ration of green grass and rate of growing calves on the basis of observations taken on 10, 14, 16, 20, 25 and 28 cows at six farms were found to be 0.318, 0.106, 0.253, 0.340, 0.116 and 0.112. Can these be considered homogeneous ? If so, estimate the common correlation coefficient.

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