Engineering, 26.09.2019 17:10 lrich20200
The mean breaking strength of yarn used in manufacturing drapery material is required to be at least 100 psi. past experience has indicated that the standard deviation of breaking strength is 2.8 psi. a random sample of 9 specimens is tested, and the average breaking strength is found to be 100.6 psi. statistical tables and charts (a) calculate the p-value. round your answer to 3 decimal places (e. g. 98.765). if alpha equals 0.05, should the fiber be judged acceptable? the tolerance is +/-2% (b) what is the probability of not rejecting the null hypothesis at alpha equals 0.05 if the fiber has a true mean breaking strength of 102 psi? round your answer to 3 decimal places (e. g. 98.765). the tolerance is +/-2% (c) find a 95% one-sided lower confidence interval bound on the true mean breaking strength. round your answer to three decimal place (e. g. 98.765). the tolerance is +/-2% (d) use the confidence interval found in part (c) to test the hypothesis upper h subscript 0. (e) what sample size is required to detect a true mean breaking strength of 101 with probability 0.95?
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