X Is a Normally Distributed Random Variable with a Mean $\le$

question 36

Essay

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 $\le$ 45)
b.P(45 $\le$ x $\le$ 55)
c.P(x $\ge$ 55)
d.x value with .20 in the lower tail
e.x value with .01 in the upper tail

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