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1. Coefficient of correlation between X and Y for 20 items is 0.3. Mean of X is 15 and that of Y is 20. Standard

1.Coefficient of correlation between X and Y for 20 items is 0.3. Mean of X is 15 and that of Y is 20. Standard deviations are 4 and 5 respectively. Later on it was found that the item 27 has been wrongly taken as 17 in case of X and 35 instead of 30 in case of Y Series. Find out correct coefficient of correlation.

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