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Comcast Corporation is the largest cable television company, the second largest Internet service provider, and the fourth largest telephone service provider in the United States. Generally known for quality and reliable service, the company periodically experiences unexpected service interruptions. On January 14, 2014, such an interruption occurred for the Comcast customers living in southwest Florida. When customers called the Comcast office, a recorded message told them that the company was aware of the service outage and that it was anticipated that service would be restored in two hours. Assume that two hours is the mean time to do the repair and that the repair time has an exponential
- a. What is the probability that the cable service will be repaired in one hour or less?
- b. What is the probability that the repair will take between one hour and two hours?
- c. For a customer who calls the Comcast office at 1:00 p.m., what is the probability that the cable service will not be repaired by 5:00 p.m.?
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- Gulf Real Estate Properties, Inc., is a real estate firm located in southwest Florida. The company, which advertises itself as "expert in the real estate market," monitors condominium sales by collecting data on location, list price, sale price, and number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course, near but not on the Gulf. Sample data from the Multiple Listing Service in Naples, Florida, provided recent sales data for 40 Gulf View condominiums and 18 No Gulf View condominiums. Prices are in thousands of dollars. The data are shown in the following table. Gulf View Condominiums No Gulf View Condominiums List Price Sale price Days to Sell List Price Sale Price Days to Sell 495 475 130 217 217 182 379 350 71 148 135.5 338 529 519 85 186.5 122 95 239 150 552.5 534.5 552.5 534.5 95 334.9 334.9 505 165 ×Ô¶5±2259828846§§A**_¶****888*A***** 0 210…arrow_forwardGulf Real Estate Properties, Inc., is a real estate firm located in southwest Florida. The company, which advertises itself as "expert in the real estate market," monitors condominium sales by collecting data on location, list price, sale price, and number of days it takes to sell each unit. Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course, near but not on the Gulf. Sample data from the Multiple Listing Service in Naples, Florida, provided recent sales data for 40 Gulf View condominiums and 18 No Gulf View condominiums. Prices are in thousands of dollars. The data are shown in the following table. Gulf View Condominiums No Gulf View Condominiums List Price Sale price Days to Sell List Price Sale Price Days to Sell 495 475 130 217 217 182 379 350 71 148 135.5 338 529 519 85 122 552.5 534.5 95 150 552.5 534.5 95 334.9 334.9 550 505 169.9 165 210 945 314 305 800 210 *10 975 314 315 885…arrow_forwardKentville, a community of 10,000 people, resides next to a krypton mine, and there is a concern that the emission from the krypton smelter have resulted in adverse effects. Specifically, Kryptonosis seems to have killed 12 of Kentville’s inhabitants last year. A neighboring community, Lanesburg, has 25,000 inhabitants and is far enough from the smelter to not be affected by the emission. In Lanesburg, only three people last year died of Kryptonosis. Given that the number of deaths in Kentville and their causes last year were: Heart attack=7 Accidents=4 Kryptonosis=12 Other=6 What is the risk of dying of Kryptonosis in Kentville relative to non-contaminated locality?What is the risk of dying of Kryptonosis in Kentville relative to deaths due to other causes? How many times the chance of dying of Kryptonosis compared to dying of accidents ? How many times the chance of dying of Kryptonosis compared to Other causes?arrow_forward
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- According to the American Red Cross, O positive is the most common blood type. Approximately 45% of the U.S. population has type O blood. However, type O is routinely in short supply and in high demand by hospitals—both because it is the most common blood type and because type O negative blood, in particular, is the universal blood type needed for emergency transfusions. The local American Red Cross is holding a blood drive. How many donors should they expect to collect from until they get a donor with type O blood? What is the probability that the first donor with type O blood occurs on the mean of the distribution? Round your answer to the nearest hundredth if necessary. The American Red Cross had 75 donors show up to their drive and donate blood. How many donors would you expect to have type O blood? The American Red Cross had 75 donors show up to their drive and donate blood. By about how many donors would the expected value for donors with type O blood vary? You find out…arrow_forwardRecent research commissioned by Vodafone suggests that older workers are the happiest employees (BBC News, July 21, 2008). The report documents that 70% of older workers in England feel fulfilled, compared with just 50% of younger workers. A demographer believes that an identical pattern does not exist in Asia. A survey of 120 older workers in Asia finds that 75 feel fulfilled. A similar survey finds that 58% of 210 younger workers feel fulfilled. (You may find it useful to reference the appropriate table: z table or t table) At the 5% level of significance, test if older workers in Asia feel less fulfilled than their British counterparts. a-1. Select the null and the alternative hypotheses. multiple choice 1 H0: p = 0.70; HA: p ≠ 0.70 H0: p ≤ 0.70; HA: p > 0.70 H0: p ≥ 0.70; HA: p < 0.70 a-2. Calculate the sample proportion. (Round your answer to 3 decimal places.) a-3. Calculate the value of test statistic. (Negative value should be indicated…arrow_forwardDes P. Rada is a third-year business student. In her desire to find her “Mr. Right”, she accessed a Filipino dating site Kindling. To join Kindling, she was required to reveal her private information such as complete name, location, contact details, the school she went to, the companies or places she worked for, etc. These data will eventually be shared by Kindling users, users’ friends or the dating website itself. For whatever reasons, Des P. Rada’s personal data were publicly posted and, hence, made known to others who are not members of Kindling. As a result, Des P. Rada has not only been cyber-bullied by suitors that she disliked and rejected, but ridiculed by some of her classmates, and even stalked by ex-boyfriend Kanor. Des P. Rada blames Kindling of what had happened. Did Kindling violate her rights under the Data Privacy Act? Support your answer with the provision/s of the lawarrow_forward
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