Let z denote a random variable having a standard normal distribution. Determine each of the following probabilities.
a)P(z < 1.28)
b)P(z < −1.05)
c)P(z > −2.51)
d)P(−1.30 < z < 1.54)

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The Answer of Let z denote a random variable having a standard normal distribution. Determine each of the following probabilities.
a)P(z < 1.28)
b)P(z < −1.05)
c)P(z > −2.51)
d)P(−1.30 < z < 1.54)

Let Z Denote a Random Variable Having a Standard Normal