MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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69. The sample average unrestrained compressive strength
for 45 specimens of a particular type of brick was com-
puted to be 3107 psi, and the sample standard deviation
was 188. The distribution of unrestrained compressive
strength may be somewhat skewed. Does the data strong-
ly indicate that the true average unrestrained compres-
sive strength is less than the design value of 3200? Test
using a = .001.
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Transcribed Image Text:69. The sample average unrestrained compressive strength for 45 specimens of a particular type of brick was com- puted to be 3107 psi, and the sample standard deviation was 188. The distribution of unrestrained compressive strength may be somewhat skewed. Does the data strong- ly indicate that the true average unrestrained compres- sive strength is less than the design value of 3200? Test using a = .001.
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