An Investigation of the CaCO3-CaF2-K2SiO3- SiO2-Fe flux system usingthe Submerged Arc Welding Process on HSLA-100 and AISI-1081 Steelswas conducted in a series of experiments. In this investigation, the weldingfluxes with differing chemical compositions were prepared. Several weldsusing each flux were made on AISI-1018 steel base metal. The ANOVAresults of hardness measurements (in Brinell scale) of five welds using eachof four fluxes are presented in Table 2.Table 2: ANOVA of hardness measurementsSource of df Sum of squaresMean ofvariation(SS)FluxErrorTotal316191023.6608.3squares(MS)(1) Complete the ANOVA table in Table Q2(a)Fo(ii) By using a = 0.05, can we conclude that the flux types have significantinfluence on the Brinell hardness? Prove your answer.

(i) The objective is to complete the ANOVA table:

Answered: An Investigation of the…

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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Soil samples were collected at two areas surrounding an abandoned mine and analyzed for lead. At each area several samples were taken. The soil was extracted with acid, and the extract was analyzed using flame atomic absorption spectrometry. In Area A, Pb concentrations were 1.2, 1.0, 0.9, 1.4 mg/kg. In Area B, Pb concentrations were 0.7, 1.0, 0.5, 0.6, 0.4 mg/kg. Are these two areas significantly different from each other with Pb concentrations at 90% confidence level?
Based on the data from the concrete test, a production company performs tests on a new accelerator admixture for concrete with which it is intended to stabilize the resistance of 250 kg / cm2 concretes developed with the three types of cement: pozzolanic I, pozzolanic II, pozzolanic III. Perform a 95% LSD discriminant test to determinewhether or not there is a difference in the strength of the concrete.
In a certain suburb of Montréal, residents have expressed their worries about the quality of the air. Of particular concern is the concentration (in μg/m3) of particulate matter smaller than 2.5 μm in size (PM2.5). The environmental standard is a PM2.5 concentration of 15 μg/m3 or less. 9-a) To conduct this study, Thomas installs 25 PM2.5 detectors at different locations in the suburban area. Each detector will provide one reading of PM2.5 concentration at a given time. With 25 detectors, what is the probability that Thomas declares the sample mean of PM2.5 concentrations significantly greater than the environmental standard while the population mean is 16 μg/m3? The population variance is assumed to be known and equal to 9. Use α = 0.01. 9-b) Thomas is interested to purchase a new and cheaper instrument to measure PM2.5 concentration. He is worried, however, that the precision of the new instrument may be lower than that of the current one. To be acceptable, the standard…
How wellmaterials conduct heat matters when designing houses, forexample. Conductivity is measured in terms of watts of heatpower transmitted per square meter of surface per degree Celsius of temperature difference on the two sides of the material.The National Institute of Standards and Technology (NIST)provides data on properties of materials. Here are 9 NISTmeasurements of the heat conductivity of a particular type offibrous-glass board: 0.0339 0.0337 0.0334 0.0334 0.03330.0333 0.0333 0.0332 0.0330 (a) We can consider this an SRS of all specimens of fibrousglass board of this type. Make a stemplot. Is there any sign ofmajor deviation from Normality? (b) Give a 95% confidence interval for the mean conductivity. (c) Is there significant evidence at the 5% level that themean conductivity of this type of fibrous-glass board is not0.0330?
An environmental scientist developed a new analytical method for the determination of cadmium (Cd+) in mussels. To validate the method, the researcher measured the Cdt concentration in standard reference material (SRM) 2976 that is known to contain 0.82 + 0.16 ppm Cd+. Five replicate measurements of the SRM were obtained using the new method, giving values of 0.787, 0.758, 0.824, 0.838, and 0.765 ppm Calculate the mean (x), standard deviation (s,), and the 95% confidence interval. A list of i values can be found in the Student's table. X3= Ppm Ppm 95% confidence interval: + Ppm Does the new method give a result that differs from the known result of the SRM at the 95% confidence level? no yes
Twinned drill holes. A traditional method of verifying mineralization grades in mining is to drill twinned holes, i.e., the drilling of a new hole, or “twin," next to an ear- lier drill hole. The use of twinned drill holes was investi- gated in Exploration and Mining Geology (Vol. 18, 2009). Geologists use data collected at both holes to estimate the total amount of heavy minerals (THM) present at the drilling site. The data in the following table (based on information provided in the journal article) represent THM percentages for a sample of 15 twinned holes drilled at a diamond mine in Africa. The geologists want to know if there is any evidence of a difference in the true THM means of all original holes and their twin holes drilled at the mine. a. Explain why the data should be analyzed as paired differences. b. Compute the difference between the “Ist Hole" and "2nd Hole" measurements for each drilling location. c. Find the mean and standard deviation of the differ- ences, part b.
The compressive strength of an alloy fastener used in aircraft construction is being studied. Ten loads were selected over the range 2500–4300 psi, and a number of fasteners were tested at those loads. The numbers of fasteners failing at each load were recorded. The complete test data are shown in Table E11-14.
is a radionuclide used widely in nuclear medicine. 99m Tc is combined with another substance that is readily absorbed by a targeted (99 mTc) Technetium-99 body organ. Then, special cameras sensitive to the gamma rays emitted by the technetium are used to record pictures of the organ. Suppose that a technician prepares a sample of 99m, Tc-pyrophosphate to image the heart of a patient suspected of having had a mild heart attack. Part: 0 / 2 Part 1 of 2 (a) At noon, the patient is given 10 mCi (millicuries) of 99m 99m Tc. If the half-life of "Tc is 6 hr, write a function of the form Q (t) = Qe - kt to model the radioactivity level Q (t) aftert hours. Round k to four decimal places. Do not round intermediate calculations. The radioactivity level function is Q (t) =. e
The table below presents the results of the test. 1) the researchers decide to use a 70-ms cutoff and obtain following tmredults: TP = 17, FP = 15, FN = 24, TN = 44. calculate the following values: a) sensitivity b) specificity c) PV (+) d) PV (-) 2) how did changing the cut-point affect the accuracy of the test?
The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 99.70% accuracy, and chlorinated compounds with 89.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S = signal, O = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(C|S) = 0.1183 O b. P(C|S) = 0.1184 O c. None among the…
The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants-organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 99.70% accuracy, and chlorinated compounds with 89.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S= signal, 0 = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(C|S) = 0.1184 O b. P(C|S) = 0.1386 O c. None among the…
The DENR has a new procedure to detect algal bloom in water being tested. This new procedure is important because, it could be used to detect three different contaminants-organic pollutants, volatile solvents, and chlorinated compounds. The department claims that it can detect high levels of organic pollutants with 99.95% accuracy, volatile solvents with 89.70% accuracy, and chlorinated compounds with 99.70% accuracy. If an algal bloom is not present, the test does not signal. Samples are prepared for the calibration of the test and 60% of them are contaminated with organic pollutants, 27% with volatile solvents, and 13% with traces of chlorinated compounds. A test sample is selected randomly. Denote as follows: S = signal, O = organic pollutants, V = volatile solvents, C = chlorinated compounds. If the test signals, what is the probability that chlorinated compounds are present? (Show complete solution in your answer sheet) O a. P(CIS) = 0.1386 Ob.P(C|S) = 0.1184 OC. None among the…

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