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What is the area under the normal curve below the z- score of 1?

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Answer:

One way is to realize that since the total area is 1, the area below z = 1 is equal to 1 minus the area above z= 1 which we know from before is 0.1587. So the area below 1 is 1 - 0.1587 = 0.8413.

User Tuyen Nguyen
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