A piece of data was collected from each of nine people. The data was found to have

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A piece of data was collected from each of nine people. The data was found to have a mean value of 35.5. One of the nine people had given a value of 42 instead of a value of 32. a Write down the effect this will have had on the mean value. The correct data value of 32 is substituted for the incorrect value of 42. b Calculate the new mean value.

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