The sample average unrestrained compressive strengthfor 45 specimens of a particular type of brick was computedto be 3107 psi, and the sample standard deviationwas 188. The distribution of unrestrained compressivestrength may be somewhat skewed. Does the data stronglyindicate that the true average unrestrained compressivestrength is less than the design value of 3200? Testusing a 5 .001.

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