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Question 15 6 pts Green engineering practices require that the strength of recycled concrete aggregate be assessed before using them in the base of a roadway. Measurements of the resiliency modulus (MPa) on n = 18 specimen of recycled concrete aggregate produced a mean $\bar{x} = 168.2$ MPa. Find the maximum error of estimate for a level of confidence = 95%, for the population mean resiliency modulus ($\mu$), knowing that the population standard deviation is 18.10 MPa, and the variable is normally distributed. ? 1.96 ? 159.84 None of the options. ? 8.362 ? 176.56

          Question 15
6 pts
Green engineering practices require that the strength of recycled concrete aggregate be assessed
before using them in the base of a roadway. Measurements of the resiliency modulus (MPa) on n = 18
specimen of recycled concrete aggregate produced a mean $\bar{x} = 168.2$ MPa. Find the maximum error of
estimate for a level of confidence = 95%, for the population mean resiliency modulus ($\mu$), knowing that
the population standard deviation is 18.10 MPa, and the variable is normally distributed.
? 1.96
? 159.84
None of the options.
? 8.362
? 176.56

$Question 15 6 pts Green engineering practices require that the strength of recycled concrete aggregate be assessed before using them in the base of a roadway. Measurements of the resiliency modulus (MPa) on n = 18 specimen of recycled concrete aggregate produced a mean x̅ = 168.2 MPa. Find the maximum error of estimate for a level of confidence = 95%, for the population mean resiliency modulus ($\mu$), knowing that the population standard deviation is 18.10 MPa, and the variable is normally distributed. ? 1.96 ? 159.84 None of the options. ? 8.362 ? 176.56$

Added by Christopher S.

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