You have 20 pressure transmitters which have an expected service period of 10 years. 10 fail after the following months 9,18,27,36,45,54,63,72,81,90. What is the total time on test for your pressure transmitters that you will use to determine your MTTF. Answer in months
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- The total number of Corona cases in the US, please keep in mind it is a running total. Courtesy of worldometers.info Date in 2020 Day (t) Number of Corona Cases (C) Feb. 15 1 15 Feb. 26 12 68 Mar. 8 23 541 Mar. 19 34 14,896 Mar. 30 45 171,655 Apr10. 56 517,100 Apr. 21 67 835,559 May 2 78 1,170,301 May 13 89 1,443,627 May 24 100 1,704,112 June 4 111 1,942,737 June 15 122 2,187,774 June 26 133 2,556,718 July 7 144 3,109,759 July 18 155 3,849,089 July 29 166 4,588,252 Aug. 9 177 5,228,738 Aug. 20 188 5,771,205 Aug. 31 199 6,239,373 Sept. 11 210 6,673,451 Sept. 22 221 7,109,730 Let C be the total number of Corona Virus cases in the United States by the end of the t days since Feruary 14, 2020. (Let t = 0 represent Feb. 15, 2020.) Create a scatter plot of the data. Take up the entire piece of graph paper.…Some commercial airlines recirculate about half the air in the cabin during flights as a way to improve fuel efficiency. Other airlines make a policy of NOT recirculating the air and instead, have fresh air from the atmosphere constantly being inserted into the cabin with the “old” air being pumped out of the plane. A total of 1100 passengers flying from San Francisco to Denver were used for an experiment. After their flight, they were each given a list of symptoms associated with the common cold. They were asked to report if they experienced cold symptoms within 24 hours of the flight landing. Of the 517 passengers who flew on planes that recirculate the air, 108 reported post-flight cold symptoms. Of the 583 passengers who flew on airlines that do not use recirculation in the cabin, 110 reported symptoms. Suppose now that we want to use the recirculation of air data to explore “Goal #2”, which is to resolve a hypothesis test about . a) If we want to resolve this hypothesis…A baseball player has a batting average of 0.313. what is the players expected number of hits in her next 19 times at bat? Answer as a decimal rounded to 3 decimal places.
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- A new aircraft control system is being designed that must be 97.5% reliable. This system consists of three components in series. If all three of the components are to have the same level of reliability, then the level of reliability required for each component = % (enter your response as a percentage rounded to two decimal places).Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease ticks. 1). If the scientist want to estimate the proportion of the deer that carry Lyme disease ticks within 2% with 90% confidence how many deer should they sample?A new non-invasive screening test is proposed that is claimed to be able to identify patients with impaired glucose tolerance based on a battery of questions related to health behaviors. The new test is given to 75 patients. Based on each patient’s responses to the questions they are classified as positive or negative for impaired glucose tolerance. Each patient also submits a blood sample and their glucose tolerance status is determined. The results are tabulated below. What is the sensitivity of the screening test? What is the false positive fraction of the screening test? Screening Test Impaired Glucose Tolerance Not Impaired Positive 17 13 Negative 8 37
- A survey conducted between January 1, 2001 and December 31, 2001 identified 3,240 cases of Type I diabetes (T1DM) in a region with 4.5 million people. Recent studies on chronic diseases within this population found that the incidence of T1DM was 1/10,000 persons each year. What percent of the 3,240 cases were newly diagnosed during the survey period? (round to the nearest integer (percent), if the answer is 5% enter 5).The screening facility can process 1,000 people each week. Assume you are attempting early detection of yellow fever with a prevalence of 2%, the test has a sensitivity of 95%, and a specificity of 90%. How many people screened in one week will test positive? Of these, how many true positives and false positives will there be? Complete the table.If a die is rolled 64 times. (In the box model, SD=1.7) What is the expected total number of spots?
