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Z-score and Standard Normal Distributions

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If the random variable z is the standard normal score and a > 0, is it true that P(z < -a) = P(z > a)? Why or why not?

Find the z-score for the standard normal distribution where:

Area = 0.32 in the left tail

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The expert examines the z-scores and standard normal distributions.

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It is true that P(z<-a)=P(z>a). Since normal standard distribution is ...

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