1. Regression methods were used to analyze the data from a study investigating therelationship between compressive strength (x) and intrinsic permeability (y) of variousconcrete mixes and cures. Summary quantities were n=20, E y=572, E y}=23,530,Σχ-43, Σx=157.42 and Σ x γι-1 697.80.(a) Calculate the least squares estimates of the slope and intercept.(b) Estimate o?.(c) Suppose that the observed value of permeability at x=3.5 is y=41. Calculate the valueof the corresponding residual.2. Consider the following computer output:Analysis of VarianceSourcedf SSMS F p-valueRegression1Residual error1404Total19 1500a) Find the degree of freedom for the residual error.b) What is the estimate of o??c) Calculate the F-statistic value for the regression.d) Estimate the p-value for the regression F-statistic.

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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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