QUESTION 13The failure time of a component is believed to be an Exponential random variable. A component life test isperformed, with the goal being to make inferences about the mean time to failure.One component is in operation at all times; in the event of failure, the failed component is immediatelyreplaced by a new component.Observation begins at time T = 0 and ends at time T = 1,740 minutes, during which time 19 failures occur.Which is the correct limits of a 98% (two-sided) confidence interval for MTTF (in minutes).O Lower limit = 52.24Upper limit = 159.21O Lower limit = 52.64Upper limit = 159.01Lower limit = 54.64Upper limit = 157.01O Lower limit = 52.64Upper limit =157.01

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Answered: QUESTION 13 The failure time of a…

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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QUESTION 8 A survey conducted in 2015 by the health center at a university showed that 29% of the students smoked. In 2019, a new survey was conducted on a randome sample of 71 students from this university, and it was found that 20 of them smoke. We want to check whether these data provide evidence to suggest that the percentage of students who smoke has decreased over the four year period. Do the test at 10% signficance level. Select the tail type of this test. Right tail Two tail Left tail Center
Question 3 The following represents the time until the first occurrence of an earth quake in a certain geographic location in months. Derive the maximum likelihood estimator of the unknown parameter beta. Graph the histogram of the data, and compute the probability the time until the next occurrence/earth quake is less than 10 months. Data 2, 1, 3, 18, 5, 4, 3, 12, 26, 1, 22, 5, 7, 15, 18. .35 .99 .61 .65 .01
QUESTION 27 An investor has decided to form a portfolio by putting 55% of his money into Tesla's stock and 45% into Honda's stock. The investor assumes that the expected returns will be 18% on Tesla and 12% on Honda, and that the standard deviations will be 15% and 10%, respectively. What is the expected (mean) return on the portfolio? O E [Return on portfolio] = 0.135 %3D O E [Return on portfolio] = 0.204 %3D O E [Return on portfolio] = 0.153 O E [Return on portfolio] = 0.351 %3D
Question 4, section 7.3
Question 07 The average number of years a person takes to complete a graduate degree program is 3. The standard deviation is 4 months. Assume the variable is normally distributed. If an individual enrolls in the program, find the probability that it will take: a) More than 4 years to complete the program b) Less than 3 years to complete the program c) Between 3.8 and 4.5 years to complete the program
Question 14 Find the F-test statistic to test the claim that the population variances are equal. Both distributions are normal. The standard deviation of the first sample is 3.9252 5.5336 is the standard deviation of the second sample. Submit Question LEGO
Question 6 of 6 - /2 E View Policies Current Attempt in Progress Fast Auto Service provides oil and lube service for cars. It is known that the mean time taken for oil and lube service at this garage is 15 minutes per car and the standard deviation is 2.4 minutes. The management wants to promote the business by guaranteeing a maximum waiting time for its customers. If a customer's car is not serviced within that period, the customer will receive a 50 % discount on the charges. The company wants to limit this discount to at most 4% of the customers. What should the maximum guaranteed waiting time be? Assume that the times taken for oil and lube service for all cars have a normal distribution. Round your answer to the nearest minute. The maximum guaranteed waiting time should be approximately i minutes. eTextbook and Media Save for Later Attempts: 0 of 5 used Submit Answer 50 e Type here to search
Question 2 - of 20 Step 1 of 3 01:34:36 A children's clothing company sells hand-smocked dresses for girls. The length of one particular size of dress is designed to be 29 inches. The company regularly tests the lengths of the garments to ensure quality control, and if the mean length is found to be significantly longer or shorter than 29 inches, the machines must be adjusted. The most recent simple random sample of 18 dresses had a mean length of 33.46 inches with a standard deviation of 5.89 inches. Assume that the population distribution is approximately normal. Perform a hypothesis test on the accuracy of the machines at the 0.025 level of significance. Step 1 of 3: State the null and alternative hypotheses for the test. Fill in the blank below. Ho:u = 29 Ha :H 29 E Tables E Keypad Answer 2 Points Keyboard Shortcuts Next Prev 62021 Hawkes Learning
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Question. 13: find the probability a randomly selected TV will have a replacement time less than 5 years (round to three decimal places)
QUESTION 38 A repeated-measures experiment and a matched-subjects experiment each produce a t-statistic with df = 11. How many individuals participated in each study? 12 for repeated and 12 for matched. 12 for repeated and 13 for matched. 12 for repeated and 13 for matched. 12 for repeated and 24 for matched.
Question 1 A pediatric nurse is researching weight gain in premature babies. Previous research has indicated that premature babies gain a mean of 150 grams per month (assume σ = 22.3) . The nurse is researching a new program that has the goal of increasing the mean weight gain in a month. The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight gain of 160 grams per month. What is the value of the test statistic? A. -0.45 B. 2.84 C. 0.45 D. -2.84 Question 2 A pediatric nurse is researching weight gain in premature babies. Previous research has indicated that premature babies gain a mean of 150 grams per month (assume σ = 22.3) . The nurse is researching a new program that has the goal of increasing the mean weight gain in a month. The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight…

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