Question: Find the following probabilities for a standard normal random variable Z: a. P(Z # 23.72). b. P(23.72 # Z # 3.72). c. P(Z $ 1.5).

Find the following probabilities for a standard normal random variable Z:

a. P(Z # 23.72).

b. P(23.72 # Z # 3.72).

c. P(Z $ 1.5).

d. P(Z . 20.67)

b. What is the probability that a randomly selected student spends more than $240 on textbooks this semester?

c. What is the probability that a randomly selected student spends between $240 and $450 on textbooks this semester?

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