The article "Factorial Experiments in the Optimization of Alkaline WastewaterPretreatment" (M. Prisciandaro, A. Del Borghi, and F. Veglio, Industrial Engineering andChemistry Research, 2002:5034-5041) presents the results of an experiment toinvestigate the effects of the concentrations of sulfuric acid (H,So,) and calciumchloride (CaCl,) on the amount of black mud precipitate in the treatment of alkalinewastewater. There were three levels of each concentration, and two replicates of theexperiment were made at each combination of levels. The results are presented in thefollowing table (all measurements are in units of kg/m).H;5O,CaCl,15Precipitate100.211098.211030175.8216.5176.211045206.012315110.5105.51233045184.7189.0123234.0222.013615106.5107.0136301817189.013645211.8201.3a Construct an ANOVA table. You may give ranges for the P-values.b.Is the additive model plausible? Explain.c. Can you concude that H,S0, concentration affects the amount of precipitate? Explain.d. Can you concude that CaCl, concentration affects the amount of precipitate? Explain.

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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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What is the Tukey’s test critical value?
A) Compute the corresponding effect size(s) and indicate magnitude(s). d= / Magnitude = r2 = / Magnitude = B) Compute the appropriate test statistic(s) to make a decision about H0. critical value = test statistic= d= / Magnitude = r2 = / Magnitude = C) Compute the appropriate test statistic(s) to make a decision about H0 critical value = test statistic= d= / Magnitude = r2 = / Magnitude =
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2. A cohort study is conducted to assess the association between clinical characteristics and the risk of stroke. The study involves n = 1370 participants who are free of stroke at the study start. Each participant is assessed at study start (baseline) and every year thereafter for 5 years. The following data were collected relating hypertensive status measured at baseline to incident stroke over 5 years. Free of Stroke at 5 years Stroke Baseline: Not hypertensive 1000 50 Baseline: Hypertensive 300 50 Compute the cumulative incidence of stroke in patients classified as hypertensive at baseline.A)0.20B)0.50C)0.0625D)0.05
The vulnerability of inshore environments to contamination due to urban and industrial expansion in Mombasa is discussed in the paper €œMetals, Petroleum Hydrocarbons and Organo-chlorines in Inshore Sediments and Waters on Mombasa, Kenya€ [Marine Pollution Bulletin (1997) 34: 570€“ 577]. A geochemical and oceanographic survey of the inshore waters of Mombasa, Kenya, was undertaken during the period from September 1995 to January 1996. In the survey, suspended particulate matter and sediment were collected from 48 stations within Mombasa€™s estuarine creeks. The concentrations of major oxides and 13 trace elements were determined for a varying number of cores at each of the stations. In particular, the lead concentrations in suspended particulate matter (mg kg-1 dry weight) were determined at 37 stations. The researchers were interested in determining whether the average lead concentration was greater than 30 mg kg-1 dry weight. The data are given in the following table along with…
16) Unfortunately, arsenic occurs naturally in some ground water (Reference: Union Carbide Technical Report K/UR-1). A A mean arsenic level of u = 80 norta 11: safe for agriculturo1

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