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A sample of 16 joint specimens of a particular type gave a sample mean proportional limit...

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Basic Math

A sample of 16 joint specimens of a particular type gave asample mean proportional limit stress of 8.55 MPa and a samplestandard deviation of 0.79 MPa.

a)Calculate and interpret a 95% lower confidence bound for thetrue average proportional limit stress of all such joints. (Roundyour answer to two decimal places.)

b)Calculate and interpret a 95% lower prediction bound forproportional limit stress of a single joint of this type. (Roundyour answer to two decimal places.)

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SOLUTIONFrom givenA sample of 16joint specimens of a particular type gave a sample meanproportional limit stress of 855 MPa and a sample standarddeviation of 079 MPaThe total number of sample n 16Sample mean 855 M PaStandard deviation 079 MPaDegree of freedom    See Answer
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