Mathematics, 25.06.2019 00:50 fay1016

Past experience has indicated that the breaking strength of yarn used in manufacturing drapery material is normally distributed and that σ = 4 psi. a random sample of 10 specimens is tested, and the average breaking strength is found to be 93 psi. find a 95% two-sided confidence interval on the true mean breaking strength. round the answers to 1 decimal place.

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