On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally distributed with o = 100. The composition of the bar has been slightly modified, but the modification is not believed to have affected either the normality or the value ofo.Assuming this to be the case, if a sample of 49 modified bars resulted in a sample average yield point of 8420 Ib, compute a 90% CI for the true average yield point of the modified bar. (Round your answers to one decimal place.)IbHow would you modify the interval in part (a) to obtain a confidence level of 98%? (Round your answer to two decimal places.)--Select--v should be changed to

Givenσ=100sample size(n)=49Mean(x¯)=8420confidence interval =90%

Answered: On the basis of extensive tests, the…

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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