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(c) What sample size would be mandatory to obtain an error of ±10 square millimeters with 99 percent confidence? n = [t*s/E] n = [2.093*170.378/10]^2 = 1271.64 n = 1272 (when rounded up) (d) If this is not a reasonable requirement, suggest 1 that is. A 99% confidence level is not lawful for a distribution that is belike not normal. dropping it (confidence level) to a 90%, would reduce the required sample size t! o a more sensible and realistic answer. B. Exercise 8.62 In 1992, the FAA conducted 86,991 pre-employment medicine tests on job applicants who were to be engaged in gum elastic and security-related jobs, and found that 1,143 were positive. a) lay down a 95 percent confidence interval for the population isotropy of positive drug tests. The radiation diagram is E=z\cdot \sqrt{\frac{\hat{p}(1-\hat{p})}{n}} So for a 95% CI, z=1.96 The proportion who time-tested positive is obviously...If you want to get a salutary essay, holy order it on our website: BestEssayCheap.com
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