Lumber intended for building houses and other structures must be monitored for strength.Good lumber is known to have a standard deviation of 500 lbs. per square inch. Ata 95% confidence level, what is the required sample size for the margin of error to be250 lbs.?

Given,Standard deviation, σ = 500Confidence level, C = 95% = 0.95Margin of error, E = 250

Answered: Lumber intended for building houses and…

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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Lumber intended for building houses and other structures must be monitored for strength. Good lumber is known to have a standard deviation of 500 lbs. per square inch. At a 95% confidence level, what is the required sample size for the margin of error to be 250 lbs.?