Find a the mean b the deviation from the mean for each data item and c the sum of the deviations in part b for the following group of data items 42 72 57 42 87 a The mean is Simplify your answer b Complete the following table by entering the deviations for each data value 42 72 57 Simplify your answers c The sum of the deviations is answer 42 87 CEL 4