I have a question regarding no. 8 and 9. Can you explain what happened there? Also, is it not that we use ~A^A instead of ~AvD? Solution:let"CA>DJ .. premise - proof by contradichion.2) u CAVB) Vucconditional proposition pq pVq.3). AAnB) VncDe Morgan's lauw "CAVB)= mAAmB.4(u AN c)A (u BVuC)Distributive low puCqdo) = (pvqJ^ (pVoJ5) AVnc)6) ("BVuC)Decomposing a conjuncti on 4).commuta Hive low Pvq = qup.uC VnACV Dfrom premise U9) AVDResolution.conditional proposition P-q upvaHence; proved Given Argument is(AVB) C.CV D.A → uB(i): AD.To Find Prove this bu contradiction method .

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Answered: I have a question regarding no. 8 and…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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The bacterium Staphylococcus aureus is commonly found on the skin and rarely causes major problems. If it gets under the skin or into the lungs it can cause boils or pneumonia. If the strain of bacterium causing these problems is resistant to methicillin, the infections can be life threatening. Methicillin resistant Staphy- lococcus aureus or MRSA is, therefore, a major concern in hospitals and clinics. Given the death rate from MRSA lung infections is 20%, if 20 patients are admitted in the hospital find the following probabilities: (a) Less than 3 die (b) At least 3 die. (c) Between 6 and 3 die.
Please submit one excel file with answer cells that require formulas having the formulas within the cell. A manager is trying to educate employees on the effects of personal health and workplace performance. The manager has gathered data from a group of employees to evaluate the effects of sleep and sickness. The manager asked employees to record the total number of hours of sleep they had over 10 working days in two weeks and compared it to the number of sick days that each took over those 10 days. Sick Days Total hours of sleep 0 80 2 40 1 60 0 70 3 50 2 90 4 35 1 68 0 72 2 55 Is the model statistically significant at the .05 level? How much of the variability in sick days is determined by hours of sleep? PLEASE PUT THE ANSWER IN AN EXCEL FILE WITH THE FORMULAS SHOWN PLEASE USE AN EXCEL FILE.
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A team of researchers working on the development of vaccines conducted a study on two vaccines. Thirty individuals participated in the study and were randomly assigned to two groups and one group received vaccine 1 and the other group vaccine 2. The researchers then measured the amount of antibody in the individuals' blood after ingestion, entered R and calculated some fish sizes that can be seen here below. x̄1 = 494,54, s1 =52,39, x̄2 = 467,93, s2 = 45,20, d = 26,61, sd = 68,69. Blood levels of antibodies can be expected to follow normal distribution. Use α = 0,05. c) What conclusion do you draw from the hypothesis test in point b about the possible difference in the mean amount of antibody after oral administration of the vaccines? d) The researchers also created a 95% confidence interval for the difference between the averages. Will the confidence interval contain the value 0? Justify your answer without calculating the confidence interval.e) Let us now assume that there is in fact…
What is the fromula to figure out this problem? Trucks are diven ~13,000miles per year,and consume 700gallons of gas a year. How meny gallons of gas would the average truck save each year if average fuel economy increased by 5mpg?
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In West Texas, water is extremely important. The following data represent pH levels in ground water for a random sample of 102 West Texas wells. A pH less than 7 is acidic and a pH above 7 is alkaline. Scanning the data, you can see that water in this region tends to be hard (alkaline). Too high a pH means the water is unusable or needs expensive treatment to make it usable†. These data are also available for download at the Companion Sites for this text. For convenience, the data are presented in increasing order.

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