800 PM EDT WED JUL 16 2008 Satellite Image: 0652 PM EDT Outlined areas denote current position of systems discussed in the Tropical Weather Outlook. Color indicates probability of tropical cyclone formation within 48 hours. Low <30% Medium 30-50% High >50%
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A major hurricane is a category 3, 4, or 5 hurricane on the Saffir/Simpson Hurricane Scale. From the document "The Deadliest, Costliest, and Most Intense United States Tropical Cyclones From 1851 to 2004" (NOAA Technical Memorandum, NWS TPC-4, Updated 2005) by E. Blake et al., we found that of the 273 hurricanes affecting the continental United States, 92 were major. a. Based on these data, find and interpret a 90% confidence interval for the probability, p, that a hurricane affecting the continental United States will be a major hurricane. b. Discuss the possible problems with this analysis.
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Listed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. What important feature of the data is not revealed by any of the measures of variation? 14 4 14 8 16 6 12 6 10 15 14 15 1 3 The range of the sample data is (Round to one decimal place as needed.) The standard deviation of the sample data is (Round to one decimal place as needed.) The variance of the sample data is (Round to one decimal place as needed.) What important feature of the data is not revealed through the different measures of variation? A. The measures of variation reveal nothing about how the numbers of hurricanes are spread. B. The measures of variation reveal no information about the scale of the data. C. The measures of variation reveal nothing about the pattern over time. D. The measures of variation do not reveal the difference between the largest number of hurricanes and the smallest number of hurricanes in the data.
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