An automotive part must be machined to close tolerances to be acceptable specifications call for a maximum variance in the lengths of the parts of 0.013. Suppose the sample variance for 88 parts turns out to be s2 = 0.0014. (a) Choose the hypothesis applicable to this problem. H0; of = 0.013 ,H1; o 0.013 (b) Use a = 0.1 to calculate the x statistic. (Use 2decimal places). (c) What is the lower confidence limit? (Use 2decimal places). EGO (d) What is the upper confidence limit? (Use 2decimal places).

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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An automotive part must be machined to close tolerances to be acceptable to customers. Production
specifications call for a maximum variance in the lengths of the parts of 0.013. Suppose the sample variance
for 88 parts turns out to be s2=0.0014.
(a) Choose the hypothesis applicable to this problem.
H0; o = 0.013 , H1; o 0.013
(b) Use a = 0.1 to calculate the x statistic. (Use 2decimal places).
(c) What is the lower confidence limit? (Use 2decimal places).
(d) What is the upper confidence limit? (Use 2decimal places).
(e) What is the correct conclusion?
Transcribed Image Text:An automotive part must be machined to close tolerances to be acceptable to customers. Production specifications call for a maximum variance in the lengths of the parts of 0.013. Suppose the sample variance for 88 parts turns out to be s2=0.0014. (a) Choose the hypothesis applicable to this problem. H0; o = 0.013 , H1; o 0.013 (b) Use a = 0.1 to calculate the x statistic. (Use 2decimal places). (c) What is the lower confidence limit? (Use 2decimal places). (d) What is the upper confidence limit? (Use 2decimal places). (e) What is the correct conclusion?
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