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with respects to standard normal distribution, when looking for the area on the Z table how...

with respects to standard normal distribution, when looking for the area on the Z table how do I know which table to look at (positive or negative) and when do I minus 1 from the area?

Do you I always round off to two decimal points?

When the question ask for More than and less than, what should that indicate.

I want to understand when to use the 2 tables and when to minus 1.

Can I have a lucid explanation and example please

Math   Statistics-And-Probability   
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