The propagation of fatigue cracks in various aircraft parts has been the subject of extensive study in recent years. The accompanying data consists of propagation lives (flighthours/104) to reach a given crack size in fastener holes intended for use in military aircraft.0.7240.8490.8790.9000.9200.9410.9711.0101.0381.0451.0881.1251.1351.1631.2281.363(a) Compute and compare the values of the sample mean x and median x. (Round your answers to four decimal places.)flight hours/104flight hours/104%3D(b) By how much could the largest sample observation be decreased without affecting the value of the median? (Enter your answer to three decimal places.)flight hours/104

Given data 0.724 0.849 0.879 0.9 0.92 0.941 0.971 1.01 1.038…

Answered: The propagation of fatigue cracks in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The propagation of fatigue cracks in various aircraft partshas been the subject of extensive study in recent years.The accompanying data consists of propagation lives(flight hours/104) to reach a given crack size in fastenerholes intended for use in military aircraft (“StatisticalCrack Propagation in Fastener Holes Under SpectrumLoading,” J. Aircraft, 1983: 1028–1032):.736 .863 .865 .913 .915 .937 .983 1.0071.011 1.064 1.109 1.132 1.140 1.153 1.253 1.394a. Compute and compare the values of the sample meanand median.b. By how much could the largest sample observationbe decreased without affecting the value of themedian?
A study was conducted to examine if children with autism spectrum disorder (ASD) had higher prenatal exposure to air pollution, specifically particulate matter < 2.5 g in diameter (PM2.5). Researchers obtained birth records of all children born in Los Angeles between 2000 and 2008 and linked these to the Department of Developmental Services records to determine if any of those subjects had been diagnosed with ASD or not. They used the birth addresses given in the birth records to determine the average daily PM2.5 for the third trimester for each child. The standard deviation for PM2.5 among ASD subjects was found to be 34.6 and for non-ASD subjects was 16.8. Assume PM2.5 is normally distributed. 4a. What was the study design? * Randomized Clinical Trial (RCT) * Case Report * Nested Case-Control Study * Case-Control Study * cross-sectional study Cohort Study 4B. What are the null and alternative hypotheses? 4c. What type of statistical test would you use to analyze the…
Find kurtosis by using ungroup data given in the picture using quartile deviation, make sure to arrange data before solving question.
Evans conducted a study to determine if the frequency and characteristics of pediatric problems in elderly patients with diabetes present differences with respect to patients of the same age, but without diabetes. The individuals studied, interned in a clinic, were between 70 and 90 years old. Among the researchers' findings are the following statistics. with respect to the scores on the deep tendon reflexes meters:Sample without Diabetes: 79 / 2.1 / 1.1With Diabetes: 74 / 1.6 / 1.2Is it possible to conclude, based on the data, that, on average, diabetic patients they have reduced deep tendon reflexes in comparison with patients without diabetes of the same age?
Consider the CAPM. The risk-free rate is 6% and the expected return on the market is 18%. What is the expected return on a stock with a beta of 1.3 when market is efficient?
Use the standard error to construct the approximate prediction interval for Y using an alpha of 5%.
A survey in 2019 asked a random sample of U.S. adults if they believed the government was tracking all or most of their activities online or on their cell phones. Of the 671 adults aged 18–29, 396 said “yes.” Of the 977 adults aged 65 or older, 293 said “yes.” Do we have evidence to claim that the proportion is higher among the young adults as compared to the older adults? (test hypothesis at level alpha =0.05).
The average drying time of a manufacturer’s paint is 20 minutes. Investigating the effectiveness of a modifica-tion in the chemical composition of her paint, the manu-facturer wants to test the null hypothesis μ = 20 minutes against a suitable alternative, where μ is the average dry-ing time of the modified paint. (a) What alternative hypothesis should the manufactureruse if she does not want to make the modification in thechemical composition of the paint unless it decreases thedrying time?(b) What alternative hypothesis should the manufactureruse if the new process is actually cheaper and she wants tomake the modification unless it increases the drying timeof the paint?
The following data consists of the times to relapse and the times to death following relapse of 10 bone marrow transplant patients. In the sample patients 4 and 6 were alive in relapse at the end of the study and patients 7–10 were alive, free of relapse at the end of the study. Suppose the time to relapse had an exponential distribution with hazard rate lambda and the time to death in relapse had a Weibull distribution with parameters theta and alpha (a) Construct the likelihood for the relapse rate lambda. (c) Suppose we were only allowed to observe a patients death time if the patient relapsed. Construct the likelihood for theta and alpha based on this truncated sample
Dioxin Researchers have linked an increase in the inci-dence of breast cancer in Italy to dioxin released by an industrial accident in 1976. The study identified 981women who lived near the site of the accident and were under age 40 at the time. Fifteen of the women had devel-oped breast cancer at an unusually young average age of 45. Medical records showed that they had heightened con-centrations of dioxin in their blood and that each tenfold increase in dioxin level was associated with a doubling ofthe risk of breast cancer. (Science News, Aug. 3, 2002)
Suppose 10% of new scooters will require warranty service within the first months of its sale. A scooter manufacturing company sells 1000 scooters in a month. (i) Calculate the mean and standard deviation of scooters that require warranty service. (ii) Calculate the moment coefficient of skewness and Kurtosis of the distribution.
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