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# working with probability distributions.

702)

On any given day the number of leasable square feet of office space available in a small city is a normally distributed random variable within mean of 850,000 square feet and a standard deviation of 25,000 square feet.
The number of leasable square feet available in another city is normally distributed with a mean of
900,000 square feet and standard deviation of 25,000 square feet.
a. Sketch the distribution of leasable office space for both cities on the same graph.
b. What is the probability that the number of leasable square feet in the first city is less than 95,000 square feet?
c. What is the probability that the amount available in the second city is less than 925,000?

703)

The amount of money per month earned by an auditor with 10 years experience is a normally distributed random variable with mean \$3500 and standard deviation \$240.
a. What percentage of auditors with 10 years experience earn more than \$4,000 a month?
b. What percentage of auditors with 10 years experience earn less than \$3,200?
c. What is the probability that a randomly selected auditor earns between \$3250 and \$3800 per month?
d. What monthly income defines the top 10% of all auditors with 10 years experience?

#### Solution Summary

For the following probability distributions are sketched or defined. Then several questions are answered that related to understanding what the area under the curve represents.

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