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The mean change for Monday through Friday is -0.01 inch. What is the change in the barometric pressure on Friday? Chart is below.

The mean change for Monday through Friday is -0.01 inch. What is the change in the-example-1

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Answer:

(-.05 + .09 - .04 - .08 + x)/5 = -.01

(-.08 + x)/5 = -.01

-.08 + x = -.05

x = .03

The change in the barometric pressure on Friday is .03.

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