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The strength of concrete depends, to some extent, on the method used for drying. Two different drying methods showed the following results for independently tested specimens (measurements in psi): Do the methods appear to produce concrete with different mean strengths? ? Use a= 0.05 . Method I n! = 37 x̄ ! = 3.25 s! = 2.10 Method II n! = 40 x̄ != 3.24 s!= 1.90

The strength of concrete depends, to some extent, on the method used for drying. Two different drying methods showed the following results for independently tested specimens (measurements in psi): Do the methods appear to produce concrete with different mean strengths? ? Use a= 0.05 . Method I n! = 37 x̄ ! = 3.25 s! = 2.10 Method II n! = 40 x̄ != 3.24 s!= 1.90

MATLAB: An Introduction with Applications
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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The strength of concrete depends, to some extent, on the method used for drying. Two different drying methods showed the
following results for independently tested specimens (measurements in psi): Do the methods appear to produce concrete with
different mean strengths? ? Use a= 0.05 .


Method I n! = 37 x̄
! = 3.25 s! = 2.10

Method II n! = 40 x̄
!= 3.24 s!= 1.90



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