For a Variable That Has a Standard Normal Distribution

question 7

Essay

For a variable that has a standard normal distribution,
a)What is the probability that z < −1.34?
b)What is the probability that z < +2.56?
c)What is the probability that z is between −1.5 and +1.5.
d)What value of z separates the smaller 5% of the standard normal distribution from the larger 95%?
e)What values of −z and +z separate the middle 90% of the standard normal distribution from the extreme 10%?

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