QUESTION 2 Let Z be a standard normal random variable. Find P(Z>0). 1/2 1/3 1/4 QUESTION 3 Let Z be a standard normal random variable. Find P(Z<1.6). 0.0548 0.0808 0.9452 0.9554 QUESTION 4 Let Z be a standard random variable. Find a such that P(Z

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