#### Answer

This shows that Sigma z=0

#### Work Step by Step

We have previously discovered that Sigma(X - X) = 0 is a property of the mean. In English, this says that the sum of all the deviations from the mean is equal to 0.

Published by
Cengage Learning

ISBN 10:
0-49580-891-1

ISBN 13:
978-0-49580-891-6

This shows that Sigma z=0

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