The mean length of steel bolts from amanufacturing process is advertised as 15.1 mm.An inspector believes that this value is not correct.To investigate the inspector's claim, the lengths ofa random sample of size 280 bolts are measuredand found to have a sample mean of 15.6 mm.We will assume that the population of bolt lengthsis normally distributed with standard deviation of5.0 mm.Test whether the mean population length haslevel of signchanged atyour relevant steps below.nce of 10%. ShowStep 1: Hypotheses:The null hypothesis Ho is (choose one):H = 5.0 OH = 15.1 OH = 15.6H = 280.0• For the alternative hypothesis Ha we changethe equal sign in Ho to (choose one):Step 2: Rejection Region:The rejection region is bounded by the followingcritical values:Critical z value(s) = Step 2: Rejection Region:The rejection region is bounded by the followingcritical values:Critical z value(s) = ].O(Enter critical values from lowest to highest.Leave second blank empty if there is only onecritical value.)Step 3: Test Statistic:Standard Error =Calculated test statistic, z(Keep at least five significant figures for allcalculated intermediate values.)Step 4: Decision on HO:At a level of significance of 10% (choose one):Reject Ho and accept HaFail to reject Ho

Given,sample size(n)=280sample mean(x¯)=15.6population standard deviation(σ)=5α=0.1

Answered: The mean length of steel bolts from 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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