The mean cost of domestic airfares in the United States rose toan all-time high of $375 per ticket. Airfares were based on thetotal ticket value, which consisted of the price charged by theairlines plus any additional taxes and fees. Assume domesticairfares are normally distributed with a standard deviation of$120. Use Table 1 in Appendix B.
a. What is the probability that a domestic airfare is $540 ormore (to 4 decimals)?
b. What is the probability that a domestic airfare is $250 orless (to 4 decimals)?
c. What if the probability that a domestic airfare is between$310 and $490 (to 4 decimals)?
d. What is the cost for the 2% highest domestic airfares?(rounded to nearest dollar)
