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- A driver of a car stopped at a gas station to fill up his gas tank. He looked at his watch, and the time read exactly 3:40 p.m. At this time, he started pumping gas into the tank. At exactly 3:44, the tank was full and he noticed that he had pumped 10.7 gallons. What is the average rate of flow of the gasoline into the gas tank?Calculate the incidence rate of prostate cancer in this population A population of 200 healthy men was followed up for the development of prostate cancer. 10 men were followed-up for 1 year and were then lost to follow-up. After being followed-up for 5 years, 10 men developed prostate cancer. The remaining men who never developed prostate cancer were followed for 10 years.A tubes lifetime for your company's microwave follow an exponential distribution with a mean of 5.6 years. Your sales policy states that each magnetron tube has a two year warranty. What fraction of the tubes should your company plan to replace under warranty?
- Blood clotting is due to a sequence of chemical reactions. The protein thrombin initiates blood clotting by working with another protein, prothrombin. It is common to measure an individual's blood clotting time as prothrombin time, the time between the start of the thrombin-prothrombin reaction and the formation of the clot. Researchers wanted to study the effect of aspirin on prothrombin time. a)Fill in the values for the differences, absolute value of the differences, and signed ranks. b)Calculate T− and T+You want to estimate the mean hourly yield for a process that manufactures an antibiotic. You observe the process for 100 hourly periods chosen at random, with the results x = 37 ounces per hour and s = 7. Estimate the mean hourly yield (in ounces per hour) for the process. Calculate the 95% margin of error (in ounces per hour). (Round your answers to three decimal places.)Classify the statement below that is either descriptive statistics or statisticalinferencei. Assuming that less than 20% of the coconut plantation in the Philippines weredestroyed after a typhoon “Yolanda”, we should expect an increase of coconut oils at30% after the third month.ii. At least 10% of all floods reported in 2020 are caused by release of water from thedams during heavy rainfall.a. Descriptive statistics and Descriptive statisticsb. Descriptive statistics and Statistical inferencec. Statistical inference and Statistical inferenced. Statistical inference and Descriptive statistics
- Drivers arrive at a toll booth at a rate of 3 per minute during peak traffic periods. The time between consecutive driver arrivals follows an exponential distribution. What is the probability that takes less than 1/2 of a minute between consecutive drivers?This exercise provides information about data in a survey of students.The survey included 47 students who smoke and 338 who don't.Find , the proportion who smoke.Round your answer to three decimal places.Enter your answer in accordance to the question statementLengths of pregnancies of humans are N(268 days, 16 days). Use the Empirical Rule to determine the percentage of women whose pregnancies are between 252 and 284 days.
- A production process produces an item. On average, 16% of all items produced are defective. Each item is inspected before being shipped, and the inspector misclassifies an item 5% of the time. Please round the final answers to 3 decimal places. What proportion of the items will be "classified as good"? P(classified as good)=Find the probability of that he or she owns a credit card given that the student is a freshman. Round your answer to the three decimal placesYou want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population poropprtion. You would like to be 98% confident that you estimate is within 2% of the true population proportion. How large of a sample size is required?