Save Exit Submit Assignment for Gradin cercise 06.17 Algorithmic Check My Work (

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Save Exit Submit Assignment for Gradin cercise 06.17 Algorithmic Check My Work (z remaining) he mean cost of domestic airfares in the United States rose to an all harged by the airlines plus any additional taxes and fees. Assume domestic airfares a. What is the probability that a domestic airfare is s530 or mord(to 4 decimals)? -time high of $395 per ticket. Airfares were based on the total ticket value, which consisted of the price are normally distributed with a standard deviation of $105. Use Table 1 in Appendix B. 0993 b. What is the probability that a domestic airfare is $240 or less (to 4 decimals)? 0699 c..what if the probability that a domestic airfare is between $310 and S490 (to 4 decimals)? d. what is the cost for the 4% highest domestic airfares? (rounded to nearest dollar) Hide Feedback Partially Correet Check My Work (2 remaining) O- Icon Key Exercise 06.17 Algorithmic Cengage Learning I Cengage Technical Support

Explanation / Answer

c)
mean = 395 , sd = 105

P(310 < x < 490)
= P((310 - 395)/105 < z < (490 - 395)/105))
= P( -0.8095 < z < 0.9048)

P(310 < x < 490) = P( -0.8095 < z < 0.9048) = 0.6081

d)

z value at highest 4% = 1.7507

z = (x -mean)/s
1.7507 = (x - 395)/105
x = 578.822 = 579

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