Examlex
Suppose x is a normally distributed random variable with a mean of 50 and a standard deviation of 5. Use Excel to calculate the following:
a.
P(x ≤ 45)
b.
P(45 ≤ x ≤ 55)
c.
P(x ≥ 55)
d.
x value with 0.20 in the lower tail
e.
x value with 0.01 in the upper tail
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