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I would like assistance with problem 6.2, in statistics for managers using excel, 8th edition. I...

I would like assistance with problem 6.2, in statistics for managers using excel, 8th edition. I do not understand where the numbers came from in the formula? If P(z<1.84)-P( z-1.57) - .9671-.0582, where did .9671 and .0582 come from? How do you deduce those numbers from that formula?

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