d. Repeat part (c) if each person has separately observed 100 vehicles instead?Question 2Concrete placed on a structure was subsequently cored after 28 days, and the following results were obtained of thecompressive strengths from five test specimens:a. Determine the 90% two-sided confidence interval of the mean concrete strength.28.6, 23.5, 23.4, 27.8, 23.2 MPab. Suppose the confidence interval established in part (a) is too wide, and the engineer would like to have aconfidence interval to be + 2 MPa of the computed sample mean concrete strength. Generally, morespecimens of concrete would be needed to keep the same confidence level. However, without additionalsamples, what is the confidence level associated with the specified interval based on five measurements givenabove?C.d.Calculate the 95% two-sided of the standard deviation of concrete strength.Suppose that a sixth concrete cored sample will be taken in the future. What would be the likely observationvalue of the sixth sample with significance level a = 0.10?

Given data: 28.6, 23.5, 23.4, 27.8, 23.2

Answered: Question 2 Concrete placed on a…

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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