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The mean cost of domestic airfares in the United States rose to an all-time high of $385 per ticket (Bureau of Transportation Statistics website, November 2, 2012). Airfares were based on the total ticket value, which consisted of the price charged by the airlines plus any additional taxes and fees. Assume domestic airfares are normally distributed with a standard deviation of $110.
a. What is the probability that a domestic airfare is $550 or more (to 4 decimals)?
b. What is the probability that a domestic airfare is $250 or less (to 4 decimals)?
c. What if the probability that a domestic airfare is between $300 and $500 (to 4 decimals)?
d. What is the cost for the 3% highest domestic airfares? (rounded to nearest dollar)
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
A research firm observes that men are twice as likely as women to watch the Super Bowl on television. Does this information represent descriptive statistics or inferential statistics? Why?
Therefore the team needs a new arena. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed.
Enrollment for the last four semesters had been 120, 126, 110, and 130. Develop a forecast of enrollment next semester.
please give one example to explain the difference between an outlier and a data point with high leverage value. you can
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
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On the other hand, if the decision context is broadened to include solving related problems as well as the current one, the company might want to develop in-house expertise by hiring one or more permanent employees or training an existing employee..
The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation, letting the first variable be the independent (x) variable. What is the regression equation
Determined that the outbreak was caused by ice cream from one company. They sampled 9 production runs and found the level of Salmonella
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