A sample of 23 joint specimens of a particular type gave a sample mean proportional limit stress of 7.5 MPa and a sample standard deviation of 0.75 MPa. (a) Calculate the standard error. (Round your answer to four decimal places.) 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.)
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A sample of 23 joint specimens of a particular type gave a sample mean proportional limit stress of 7.5 MPa and a sample standard deviation of 0.75 MPa.
(a) Calculate the standard error. (Round your answer to four decimal places.)
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.)
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