In an article about the cost of health care, Money magazine reported that a visit to a hospital emergency room for somet

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In an article about the cost of health care, Money magazinereported that a visit to a hospital emergency room for something assimple as a sore throat has a mean cost of $328 (Money, January2009). Assume that the cost for this type of hospital emergencyroom visit is normally distributed with a standard deviation of$92. Answer the following questions about the cost of a hospitalemergency room visit for this medical service
. 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 $300and $400?
d. If the cost to a patient is in the lower 8% of charges forthis medical service, what was the cost of this patient’s emergencyroom visit?