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OpenStudy (anonymous):
The mean and the standard deviation of the sample of 40 trash bag breaking strengths are 50.575 and 1.6438. Find a t-based 95% C.I. for μ, the mean of the breaking strengths of all possible trash bags of the new type. Also find this interval using the Excel output. Are we 95% confident that μ is at least 50 pounds?
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