Question
The maximum compressive strength of a certain type of cement is being tested. The following 8 specimens were collected by a civil engineer: 2268.02311.02252.02283.02252.02270.02341.02262.0 Assume
The maximum compressive strength of a certain type of cement is being tested. The following 8 specimens were collected by a civil engineer:
2268.02311.02252.02283.02252.02270.02341.02262.0
Assume that the maximum compressive strength is normally distributed.
(a) Construct a 91% two-sided confidence interval on the mean strength.
(b) Construct a 91% upper confidence bound on the mean strength. Compare this bound with the lower bound of the two-sided confidence interval in (a) and explain why they are different.
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Statistics For Engineers And Scientists
Authors: William Navidi
3rd Edition
73376345, 978-0077417581, 77417585, 73376337, 978-0073376332
