X 2 3 4 6 7 8 10 Σx = Σx2 = According to the chart above, Ex = and Σx2 = Note: The symbol Ex means to add all the terms

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X 2 3 4 6 7 8 10 Σx = Σx2 = According to the chart above, Ex = and Σx2 = Note: The symbol Ex means to add all the terms together and Ex2 means to square all the terms and then add them all together