Let z be a normal random variable with mean 0 and standard deviation 1. The 4th decile of z is ___.
a) 0.67 b) –1.25 c) -0.25 d) 1.28 e) 0.50
a) 0.67 b) –1.25 c) -0.25 d) 1.28 e) 0.50
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