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he mean cost of domestic airfares in the United States rose to an all-time high of...

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Basic Math

he 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 domesticairfare is $555 or more (to 4 decimals)?

b. What is the probability that a domesticairfare is $260 or less (to 4 decimals)?

c. What if the probability that a domesticairfare is between $310 and $500 (to 4 decimals)?

d. What is the cost for the 3% highest domesticairfares? (rounded to nearest dollar)
$  or - Select your answer -morelessItem 5

Answer & Explanation Solved by verified expert
4.3 Ratings (587 Votes)
a Here 375 120 and x 555 We need to compute    See Answer
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