The historical on-time percentage for Amtrak's Sunset Limited is 10 percent. In July, the train was on time 0 times in 31 runs. At the .10 level of significance, has the on-time percentage fallen? Explain clearly. Use Excel to calculate the cumulative binomial probability P(X ≤ 0 | n = 31, π = .10).
Answer to relevant QuestionsAfter 7 months, none of 238 angioplasty patients who received a drug-coated stent to keep their arteries open had experienced restenosis (re-blocking of the arteries). (a) Use MINITAB to construct a 95 percent binomial ...Sketch a diagram of the decision rule for each pair of hypotheses. a. H0: μ ≥ 80 versus H1: μ < 80 b. H0: μ = 80 versus H1: μ ≠ 80 c. H0: μ ≤ 80 versus H1: μ > 80 Calculate the test statistic and p-value for each sample. a. H0: μ = 60 versus H1: μ ≠ 60, α = .025 x-bar = 63, σ = 8, n = 16 b. H0: μ ≥ 60 versus H1: μ < 60, α = .025 x-bar = 58, σ = 8, n = 25 c. H0: μ ≤ 60 ...Discuss the issues of statistical significance and practical importance in each scenario. a. A process for producing I-beams of oriented strand board used as main support beams in new houses has a mean breaking strength of ...Use Excel to find the p-value for each test statistic. a. Right-tailed test, t = + 1.677, n = 13 b. Left-tailed test, t = – 2.107, n = 5 c. Two-tailed test, t = – 1.865, n = 34
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