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Ok, here's a more detailed post. I think I figured out the problem. You need to subtract 1 from the equation on excel to get the probability. But I still don't understand why I'm getting 1's, 0's and other weird numbers. Doing it by hand doesn't work either. The z scores are completely off the chart. I'll incude the case study and the work I've done.
I appreciate the responses guys. Thanks
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