a. X > 75?
b. X < 70?
c. X > 112?
d. 75 < X < 85?
e. X < 80 or X > 110?
f. 10% of the values are less than what X value?
g. 80% of the values are between what two X values (symmetrically distributed around the mean)?
h. 70% of the values will be above what X value?

Solution Summary

The solution gives the details of calculation of probability of a random variable in different intervals.

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b. p (z ≥ 1.4)
c. p (-1.0 < z < 0.5)
d. p (1.0 < z < 1.2)
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B) -0.51
C) 0.86
D) -0.86
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b. P( -1.00 < z < or equal to 1.00)
c. P( 1.78 < z < 2.34).
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