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.