Question: 6. Assuming a random variable x follows a normal distribution with mean = 12 and = 3 re-write the following probabilities in terms

6. Assuming a random variable x follows a normal distribution with mean μ = 12 and σ = 3 re-write the following probabilities in terms of their z-score

(a) P(x < 15)

(b) P(x > 9)

(c) P(x > 14)

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