Question
A sample of 13 joint specimens of a particular type gave a sample mean proportional limit...
A sample of 13 joint specimens of a particular type gave a sample mean proportional limit stress of 8.57 MPa and a sample standard deviation of 0.73 MPa.
(a) Calculate and interpret a 95% lower confidence bound for the
true average proportional limit stress of all such joints. (Round
your answer to two decimal places.)
_________MPa
(b) Calculate and interpret a 95% lower prediction bound for
proportional limit stress of a single joint of this type. (Round
your answer to two decimal places.)
________MPa
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