8. Past experience has indicated that the breaking strength of yarn used in manufactur- ing drapery material is normally distributed and that a 2psi. A random sample of 9 specimens is tested, and the average breaking strength is found to be 98 psi. Find a 95% two -sided confidence interval on the true mean breaking news.
8. Past experience has indicated that the breaking strength of yarn used in manufactur- ing drapery material is normally distributed and that a 2psi. A random sample of 9 specimens is tested, and the average breaking strength is found to be 98 psi. Find a 95% two -sided confidence interval on the true mean breaking news.
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Transcribed Image Text:8. Past experience has indicated that the breaking strength of yarn used in manufactur-
ing drapery material is normally distributed and that a 2psi. A random sample of 9
specimens is tested, and the average breaking strength is found to be 98 psi. Find a 95%
two -sided confidence interval on the true mean breaking news.
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