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Suppose that the mean cost of domestic airfares in the United States is $399 per ticket,...

Suppose that the mean cost of domestic airfares in the United States is $399 per ticket, with a standard deviation of $119. If domestic airfares are normally distributed, what is the cost for the highest 5% of domestic airfares?

Math   Statistics-And-Probability   
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Answer #1

p(X>x)= 0.05

so p(X<x ) = 0.95

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