A thread manufacturer tests a sample of eight lengths of a, Basic Statistics

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A thread manufacturer tests a sample of eight lengths of a

Question: A thread manufacturer tests a sample of eight lengths of a certain type of thread made of blended materials and obtains a mean tensile strength of 8.2 lb with standard deviation 0.06 lb. Assuming tensile strengths are normally distributed, construct a 90% confidence interval for the mean tensile strength of this thread.

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Basic Statistics: A thread manufacturer tests a sample of eight lengths of a

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Basic Statistics: A thread manufacturer tests a sample of eight lengths of a

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