# The variable Z is normally dis

The variable Z is normally distributed with mean 0 and standard deviation 1.

Find the values a and b, symmetric with respect to the mean 0, such that:

The probability that the variable is less than a or greater than b is 0.63, that is, P(Z < a or Z > b) = 0.63

Select one:

A)

a = -0.63

b = 0.63

B)
a = -0.37

b = 0.37

C)

a = -0.74

b = 0.74

D)

a = -0.48

b = 0.48

# The variable Z is normally dis

The variable Z is normally distributed with mean 0 and standard deviation 1.
Find the values a and b, symmetric with respect to the mean 0, such that:
The probability that the variable is less than a or greater than b is 0.80, that is, P(Z < a or Z > b) = 0.80

Select one:

A)

a = -0.8

b = 0.8

B)
a = -0.2

b = 0.2

C)

a = -0.25

b = 0.25

D)

a = -0.79

b = 0.79

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