# Normal Probability

In an article about the cost of health care, Money Magazine reported that a visit to a hospital emergency room for something as simple as a sore throat has a mean cost of $328. Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92.

a. What is the probability that the cost will be more than $500?

b. What is the probability that the cost will be less than $250?

c. What is the probability that the cost will be between $300 and $400?

d. If the cost to a patient is in the lower 8% of charges for this medical service, what was the cost of the patient's emergency room visit?

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In an article about the cost of health care, Money Magazine reported that a visit to a hospital emergency room for something as simple as a sore throat has a mean cost of $328. Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of ...

#### Solution Summary

The solution provides step by step method for the calculation of probability using the Z score. Formula for the calculation and Interpretations of the results are also included.