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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Determine the sample size needed to estimate the density of a new asphalt mix with a precision of 4....
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