Aggregate with a low measre of thermal conductivity is desirable for paving. Two types of aggregate are randomly sampled and tested fir thermal conductivity, with 25 observations from X (lower cost type) with mean 0.485 and standard deviation 0.18, and 25 observations from Y (higher cost type) with mean 0.372 and standard deviation 0.16.
(a) Find the standard error of the difference in the sample means bar-X - bar-Y.
Var(bar-X - bar-Y) =
The standard error is...
b) Obtain a 99% CI for the mean difference.
Please see the attached file for the fully formatted problems.© BrainMass Inc. brainmass.com June 3, 2020, 5:57 pm ad1c9bdddf
Please see the attached file for the complete solution.
Thanks for using BrainMass.
Standard Error of Difference in Sample Means and Confidence Intervals are investigated.