City crimes records show that 20% of all crimes are violent and 80% are nonviolent. Ninety percent of violent crimes are reported versus 70% of nonviolent crimes. What is the overall reporting rate for crimes in the city?
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- A student's research shows that there were more accidents in 2015 than there were in 1915. He concludes that people were better drivers in 1915 than in 2015.What would be a more appropriate or valid measure for this comparison? A.Compare the number of people who don't have an accident for 1915 and 2015 B.Compare the number of car accidents in those years, grouped by region C. Compare the number of car accidents in 1905 and 2005 D.Compare the accident rates(percentages) for 1915 and 20153. Explain the differences between categorical and qualitative data. Provide examples.A scientist studied the spread of AIDS and concluded that 24% of people contracted the disease. There is a problem with this conclusion. What should the correct conclusion state?
- A pool of 500 Houston residents indicated that 16% of them participated in Women’s March on January 21, 2017. We are interested in figuring out the actual percentage of Houston residents that participated in Women’s March. Please answer the following questions. 1. What kind of data is this? Numerical data Categorical data 2. What is the research question? What is the population proportion of Houston residents who participated in Women’s March? What is the percentage of 500 Houston residents who participated in Women’s March? What is the population of Houston residents? What is the sample proportion among the 500 Houston residents who participated in Women’s March? What is the population of Houston residents who participated in Women’s March? What is the pool of 500 Houston residents? 3. What is the population of interest? All Houston residents All US residents 16% of the 500 Houston residents from the pool who participated in Women’s…In 2014, what ratio of construction worker injuries resulted in death?a.1 out of 5Correctb.1 out of 50Incorrectc.1 out of 100Incorrectd.1 out of 1,000According to the 2017 Corporate Travel Index compiled by Business Travel News, the average daily cost for business travel in the United States rose to $321 per day (Executive Travel website). The file Travel contains sample data for an analogous study on the estimated daily living costs for an executive traveling to various international cities. The estimates include a single room at a four- star hotel, beverages, breakfast, taxi fares, and incidental costs. Click on the datafile logo to reference the data. DATA file City Daily Living Cost ($) City Daily Living Cost ($) Bangkok 242.87 Мехico City 212.00 Bogota 260.93 Milan 284.08 Cairo 194.19 Mumbai 139.16 Dublin 260.76 Paris 436.72 Frankfurt 355.36 Rio de Janeiro 240.87 Hong Kong 346.32 Seoul 310.41 Johannesburg 165.37 Tel Aviv 223.73 Lima 250.08 Toronto 181.25 London 326.76 Warsaw 238.20 Madrid 283.56 Washington, D.C. 250.61 a. Compute the sample mean (to 2 decimals). 260.21 b. Compute the sample standard deviation (to 2 decimals). S…
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