Q3.) In an experiment, the following reading were recorded:X₁Yi3.69.34.810.27.211.56.91210.718.66.113.27.910.89.522.71- Derive the normalized equations for this reading if (y = a + bx) by LSA method.2- Determine the best fitting of reading (theoretical values of y).3- Estimate the value of y at x=2.55.412.7

Please find attachment below. LSA-least square method

Answered: Q3.) In an experiment, the following…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Q2. A fast-food chain decided to carry out an experiment to assess the influence of advertising expenditure on sales. Different relative changes in advertising expenditure, compared to the previous year, were made in eight regions of the country, and resulting changes in sales levels were observed the accompanying table shows the results. Increase in advertising expenditure (%) 0 5 15 20 25 30 35 40 Increase in sales (%) 5 10 18 25 35 50 60 65 Determine the value of ∑X, ∑X2, ∑Y, ∑Y2, ∑XY. Where X represent independent variable and Y for dependent variable. Determine and interpret the coefficient of correlation between the two variables. Determine the value of regressions coefficients and write down the simple linear regression model. Test the validity of the…

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