Q14. An engineer designs a new composite structure designed to suppress vibrations andneeds to characterise its performance in terms of the amount of internal damping it has.From previous experience it is known that the damping coefficient is highly sensitiveto slight variations in manufacturing.Numerical simulations of the initial design of the structure indicate that the dampingcoefficient should be 0.22 with a standard deviation of 0.06. Five copies of the designare then manufactured and their damping coefficients measured and tabulated below.Initial design Damping coefficientCopy 10.13Copy 20.17Copy 30.25Copy 40.16Copy 50.16Use an appropriate hypothesis test to determine whether the numerical simulations arerepresentative of the actual experimental results tabulated above. Use a significancelevel of 10%.In your workings, state any assumptions you are making about the data.

Given the data of five copies of the manufactured designs and their damping coefficients as…

Answered: Q14. An engineer designs a new…

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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An engineer claims the population mean of a certain batch process is 400 grams. To check his claim he takes a random sample of 36 batches and he is satisfied with his claim if his t-value lies in the range (t0.90, t0.10). Should he be satisfied with his claim if his random sample has a sample mean of 430 grams and a sample standard deviation of 90 grams?
If the beam is $12 \mathrm{ft}$ long, $W$ has mean 1.5 and standard deviation $.25,$ and the fixed loads are as described in part (a) of Exercise $66,$ what are the expected value and variance of the bending moment? [Hint: If the load due to the beam were $w$ kip-ft, the contribution to the bending moment would be $\left.w_{0}^{12} x d x .\right]$
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Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C.A single thermometer is randomly selected and tested. Let Z represent the reading of this thermometer at freezing. What reading separates the highest 24.42% from the rest? That is, if P(z>c)=0.2442, find c.c= Incorrect °C
Question A - A company producing steel nails receives an order for 5000 nails of length 50 mm. Due to externalfactors such as temperature and pressure, the lengths of the nails produced by the machine is normallydistributed with a standard deviation of 1.6 mm. Acceptable lengths (lengths that any customer willconsent to buy) must have a tolerance of 2 mm. If the machine is set to produce nails with a meanlength of 5.0 cm, determine the percentage of nails that are acceptable. A. 0.7888 / B. 0.8877 / C. 0.9921 / D. 0.7878 Further to the information provided in question A above, we are informed that nails produced thatare shorter than the minimum acceptable length have to be scrapped. Consider that 4.8cm is still theminimum threshold for acceptable nail length. If the cost to produce one nail is 45 cents, how muchdoes the company incur in Rand losses due to scrapping? A. R247.70 / B. R347.91 / C. R237.60 / D. R471.99 Further considering information given in questions A and question B, if…
1.D.G co. has an average gross sales of 37 million per week from their products in alloutlets with a standard deviation of 6 million. An area manager found out that the averagegross sales from the 32 outlets under his area is 34.8 million per week. Is the mean salesof the products in 32 branches significantly different from the mean sales in all outlets?Use ∝ = 5%a. Perform the 5 steps in testing hypothesis with two-tailed or two- sided tests.b. Perform the 5 steps in testing hypothesis with one tailed or one - sided tests.And N= 45 branches. (All other given are the same) 2. The subject coordinator wants to find out if the webcasting methods of teaching socialsciences subjects more effective than the existing standard method of teaching. Two classesof approximately equal intelligence were selected. From one class, the teacher selectedstudents in random as experimental group for webcasting methods, And from the other class,the teacher selected another sample students for existing…

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