A student collected concentration versus absorbance data for a series of standardsand produced a standard curve. Which value of 2 would reflect the linearregression curve the student produced?Absorbance10.90.80.70.60.50.40.30.20.100² = 0.10² = 0.76² = 0.982 = 0.451Absorbance vs. Concentration23Concentration (ppm)456

A student collected concentration versus absorbance data for a series of standards and produced a…

Answered: A student collected concentration…

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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A simple linear regression model was used to describe the relationship between y = hardness of molded plastic and x = amount of time elapsed since the end of the molding process. Summary quantities included n = 16, SSResid = 1235.470, and SSTo = 25,221.368. (a) Calculate an estimate of ?. (Round your answer to three decimal places.) What value for degrees of freedom is associated with this estimate? (b) What percentage of observed variation in hardness can be explained by the linear relationship between hardness and elapsed time? (Round your answer to one decimal place.) _____%
The following data shows the height children with time: Age X, in |(months) Height Y, in ( cm) 18 19 20 21 22 76.1 77.0 78.1 78.2 78.8 The regression equation, correct to 3 decimal place is Drag and drop the correct answer. Y = 0.517X + 55.876 Y = 0.688X + 63.927 Y = 0.635X + 64.928 Y = 0.669X + 62.216 %3D
A regression line is used to satisfactorily describe the relationship between the width of tires in inches and lifespan (in months) of 14 tires in a tire performance study. The regression analysis is shown. Variable Constant Coeff SE Coefft Ratio p-Value 7.3985 0.5638 13.12 Width of tires 3.9571 3.9571 0.7382 R squared = 88.5% O 7.3985 ± 2.624(0.5638) O 3.9571±2.65(0.7382) O 3.9571±2.624(0.7382) 5.36 Which expression should be used to compute a 98 percent confidence interval for the slope of the regression line? O 7.3985 +2.681(0.5638) O 3.9571 +2.681(0.7382) 0.034 0.005 R squared (adj) = 87.9%
Aa 0 4 Earthquake Measurements Mag Depth D 1.54 12.7 1.16 8.6 0.94 14.4 www 1.64 PEN 1.94 0:00 1.66 100 2.93 1.85 1.19 2.66 2.54 HONDEN 0.73 pape 2.43 BEN 1.47 DA 0.35 de 0.47 TODA 1.99 0.39 1.42 OTHE 0.45 2.09 2.12 1.55 1.52 0.76 0.46 0.11 0.56 2.88 Print HA 2.5 HATA 16.3 SHAREE 2.7 DIN 9.1 1010 9.2 1000 18.9 BON 9.7 Bol 9.8 18.9 18.8 6.9 15.2 15.5 17.2 4.4 18.4 14.5 19.9 2.9 Ku 6.3 18.6 7.5= 4.9 15.4 16.9 12 R 4 0 - X Done Done 何 111 Earthquake Measurements 2.03 13.3 2.12 2.9 1.55 6.3 1.52 18.6 0.76 7.5 0.46 4.9 0.11 15.4 0.56 16.9 2.88 12.8 2.85 13.3 0.21 14.9 0.93 5.1 1.61 3.2 2.26 7.6 1.01 11.5 0.97 17.6 2.73 18.9 0.85 5.3 1.02 2.5 0.37 6.8 1.37 14.9 1.96 15.3 1.54 8.1 0.81 3.8 0.99 12.9 2.54 8.9 2.63 11.1 1.32 7.6 1.05 14.3 1.33 14.1 Print Done - X 4 points Sa edicted depth of an earthqu
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A particular article used a multiple regression model with the following four independent variables. y = error percentage for subjects reading a four-digit liquid crystal displayx1 = level of backlight (from 0 to 122 cd/m)x2 = character subtense (from .025 to 1.34)x3 = viewing angle (from 0 to 60)x4 = level of ambient light (from 20 to 1500 lx) The model equation suggested in the article is given below. (a) Assume that this is the correct equation. What is the mean value of y when x1 = 30, x2 = 0.6, x3 = 50 and x4 = 150?(b) What mean error percentage is associated with a backlight level of 40, character subtense of 0.6, viewing angle of 20, and ambient light level of 30?
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