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Sec7S11 - AEM 2100 Spring 2011 Section 7 1 Name Section...

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AEM 2100 Name: _________________ Spring 2011 Section: Section 7 1.) When confronted with an in-flight medical emergency, pilots and crew can consult staff physicians at MedAire, an emergency facility in Tempe, Arizona. If MedAire is called, there is a 4.8 percent chance that the flight will be diverted for an immediate landing. Suppose MedAire was called 8,465 times (as it was in 2002). a.) What is the expected number of diversions? The standard deviation of the number of diversions? b.) What is the approximate probability of at least 400 diversions? c.) What is the approximate probability of fewer than 450 diversions? d.) What is the approximate probability of between 350 and 450 diversions (inclusive)?
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2.) The U.S. Census Bureau announced that the median sales price of new houses sold in 2009 was $215,600 and the mean sales price was $270,100 ( www.census.gov/newhomesales , March 30, 2010). Assume that the standard deviation of the prices is $90,000. a.) If you select samples of size n = 2, describe the shape of the sampling distribution of x .
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