An article in The Engineer ("Redesign for Suspect Wiring," June 1990) reported the results of an investigation into wiring errors oncommercial transport aircraft that may produce faulty information to the flight crew. Such a wiring error may have been responsiblefor the crash of a British Midland Airways aircraft in January 1989 by causing the pilot to shut down the wrong engine. Of 1600randomly selected aircraft, sixteen were found to have wiring errors that could display incorrect information to the flight crew.(a) Find a 90% confidence interval on the proportion of aircraft that have successful wirings.Blank 1 < p < Blank 2(b) Suppose we use the information in this example to provide a preliminary estimate of p. How large a sample would be requiredto produce an estimate of p that we are 95% confident differs from the true mean wiring errors by at most 0.008?Blank 3 aircrafts(c) Suppose we did not have a preliminary estimate of p. How large a sample would be required if we wanted to be at least 90%confident that the sample proportion differs from the true proportion of successfully wired aircrafts by at most 0.008 regardless ofthe true value of p?Blank 4 aircrafts

Answered: Image /qna-images/answer/d0363da8-e007-47d7-8c3b-a54f2c4ce1d4.jpg

Answered: An article in The Engineer ("Redesign…

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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Only the question 5 and 6 need to be resolved. Others have been reaolved already. Question: sample of 15, 10 years old children was taken to study whether watching television reduces the amount of physical exercise, causing weight gains. The number of kilograms each child was overweight by was recorded (a negative number indicates the child is underweight). In addition, the number of hours of television viewing per week was also recorded. These data are listed in the table below. Television(hours) 42 34 25 35 37 38 31 33 19 29 38 28 29 36 18 Overweight (Kg) 8 3 0 0 6 6 3 3 -4 4 4 2 1 6 -3 Use an appropriate plot to investigate the relationship between Television(hours) and Overweight (KG). Briefly explain the selection of each variable on the X and Y axes and why? Calculate and interpret the coefficient of correlation (r) between Television(hours) and Overweight (KG).…
A state fisheries commission wants to estimate the number of bass caught in a given lake during a season in order to restock the lake with the appropriate number of young fish. The commission could get a fairly accurate assessment of the seasonal catch by extensive “netting sweeps" of the lake before and after a season, but this technique is much too expensive to be done routinely. Therefore, the commission samples a number of lakes and record the seasonal catch (thousands of bass per square mile of lake area) and size of lake (square miles). A simple linear regression was performed and the following R output obtained. Estimate Std. Error t value Pr(>|t|) (Intercept) 2.5463 0.4427 5.7513 0.0000 size 0.0667 0.3672 0.1818 0.8578 If a scatterplot showed a non-linear relationship between the response and explanatory variables, what should be done? O Nothing. Continue the analysis as is. Stop the analysis. Perform a natural log transformation on the response variable first. O Perform a…
An anger-management course claims that, after completing its seminar, participants will lose their tempers less often. Always a skeptic, you decide to test this claim. A random sample of 12 seminar participants is chosen, and these participants are asked to record the number of times that they lost their tempers in the two weeks prior to the course. After the course is over, the same participants are asked to record the number of times that they lost their tempers in the next two weeks. The following table lists the results of the survey. Using these data, test the claim at the 0.01 level of significance assuming that the population distribution of the paired differences is approximately normal. Let participants before completing the anger-management course be Population 1 and let participants after completing the anger-management course be Population 2. Number of Times Temper Was Lost during a Two-Week Period Before 10 6 8 10 6 3 10 3 8 After 6 7 4 4 8 6 4 9 3 7 Copy Data Step 2 of 3:…
In 1961, the Child Health and Development Studies (CHDS) collected data on the births of over a thousand infants to determine a possible connection between infants' birthweights and parental smoking. The data provided are a subset of this data set, and they include each infant's birth weight in ounces. "BirthWeightounces" 112 87 116 91 105 115 97 145 120 124 117 102 113 118 108 122 138 128 133 125 116 128 101 134 128 126 135 113 132 126 137 124 126 112 132 143 110 137 131 110 110 92 132 85 131 75 131 136 122 139 75 147 119 128 120 104 114 105 116 103 143 110 124 127 108 122 134 128 84 130 97 86 129 110 124 116 125 113 117 117 119 115 144 99 78 135 124 128 101 111 125 104 174 115 105 114 119 110 69 102 121 134 106 123 109 127 145 117 118 129 85 138 121 130 176 130 116 133 139 122 75 116 121 130 119 103 101 144 106 129 134 121 126 115 120 127 86 114 124 124 94 119 142 137 131 96 112 132 113 117 135 110 79 136 99 104 128 142 96 143 108 102 115 130 125 126 104 135 139 143 128 132 110 117…
A researcher is interested in the relationship between birth order and personality (outgoing versus reserved). A sample of n = 100 people is obtained, all of whom grew up in families as one of three children. Each person is given a personality test, and the researcher also records the person’s birth-order position (1st born, 2nd, or 3rd). The frequencies from this study are shown in the following table. On the basis of these data, can the researcher conclude that there is a significant relation between birth order and personality? Test at the .05 level of significance. 1st 2nd 3rd Outgoing 13 31 16 Reserved 17 19 4
Please use the following information to answer questions 7a-7c: Research has shown that people are more likely to show dishonest and self-interested behaviors in darkness than in well-lit environment (Zhong, Bohns, & Gino, 2010). In one experiment, participants were given a set of 20 puzzles and were paid $0.50 for each one solved in a 5-minute period. However, the participants reported their own performance and there was no obvious method for checking their honesty. Thus, the task provided a clear opportunity to cheat and receive undeserved money. One group of participants was tested in a well-lit room and a second group was tested in a room with dimmed lighting . The reported number of solved puzzles was recorded for each individual. The following data represent results similar to those obtained in the study. Well-Lit Room (Group1) Dimly-Lit Room (Group2)…
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Answer A, B1, and B2: A. The National Institute of Mental Health published an article stating that in any one-year period, approximately 9.5 percent of American adults suffer from depression or a depressive illness. Suppose that in a survey of 100 people in a certain town, seven of them suffered from depression or a depressive illness. Conduct a hypothesis test to determine if the true proportion of people in that town suffering from depression or a depressive illness is lower than the percent in the general adult American population. B. Researchers interested in lead exposure due to car exhaust sampled the blood of 52 police officers subjected to constant inhalation of automobile exhaust fumes while working traffic enforcement in a primarily urban environment. The blood samples of these officers had an average lead concentration of 124.32 µg/l and a SD of 37.74 µg/l; a previous study of individuals from a nearby suburb, with no history of exposure, found an average blood level…

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