Engineering, 12.12.2019 06:31, aaivey9815
Determine the sample size needed to estimate the density of a new asphalt mix with a precision of 4.0 kg m-3 if the population standard deviation is unknown and the sample standard deviation is assumed to be 8.0 kg m3. use a significance level of 0.02.
a. what is the confidence level?
b. what sample size is estimated using the z distribution? can the z distribution be used? should the t distribution be used? explain.
c. what sample size is estimated using the t distribution? document your work in a table, with sample calculations shown below the table.
Answers: 3
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The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
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Engineering, 04.07.2019 18:10, ashleybaber4966
If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79
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Engineering, 04.07.2019 18:10, qwertylol12345
Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.
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The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
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Determine the sample size needed to estimate the density of a new asphalt mix with a precision of 4....
Mathematics, 18.11.2019 19:31