Question: 4.67 Suppose that z is a random variable having a standard normal distribution. a. Find a value zo, such that P(z > 20) =

4.67 Suppose that z is a random variable having a standard normal

4.67 Suppose that z is a random variable having a standard normal distribution. a. Find a value zo, such that P(z > 20) = .01. b. Find a value zo, such that P(z

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