Leo G.

asked • 09/18/19

Suppose Z is a standard normal random variable

Question 1: If P( -z < Z < z ) = 0.7814, find z.

Question 2: Find P( -2.11 < Z < -0.42).

I believe the first question, I have to do: 0.5 + (1/2)(0.7814). But I don't know what to do after.

1 Expert Answer


Timothy K. answered • 09/18/19

4.9 (8)

Former Adjunct Math and Statistics Professor

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