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Homework Task - Calculus

Question Description

Need help with my question - I’m studying for my class.

G.1.

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?

G.2.

Find the (two) z-scores that bound the middle 40% of the standard normal distribution.

Need answers with explanations since I have no idea about this subject, yet.

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