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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 8.56 MPa and a sample standard deviation of 0.75 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.)

(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.)

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orchestra answered 2 years ago
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