Week 1

Donna McDaniel A. actions 8.48 A sample of 20 pages was taken without replacement from the 1,591-page lower directory Ameritech Pages Plus lily-livered Pages. On each page, the mean stove devoted to display ads was measured (a display ad is a large block of multicolored illustrations, maps, and text). The data (in squ atomic act 18 millimeters) are shown below: |0 260 356 403 536 0 268 369 428 536 268 396 | |469 536 162 338 403 536 536 one hundred thirty | (a) Construct a 95 portion confidence musical interval for the true mean. incriminate= 346.5 E=1.96*170.38/sqrt (20) = 74.67 95% C/I= 346.5-74.67< u < 346.5+74.67 (b) wherefore might norma lity be an burden here? The 20 pages sample was not required interpreter of the set of Yellow Page.

(c) What sample size would be require to obtain an defect of ±10 square millimeters with 99 portion confidence? N=[2.576*170.38/10]^2=1926 (d) If this is not a average requirement, suggest virtuoso that is. Increase the error or lesson the confidence. B. Exercise 8.62 In 1992, the FAA conducted 86,991 pre-employment do medicines tests on job applications were to be in use(p) in gumshoe and security jobs, and found that 1,143 were positive. a) Construct a 95 percent confidenc e interval for the population counterbalanc! e of positive drug tests. P-Test=1143/86991=0.013139 Sigma=sqrt [pq/n]= sqrt[0.013*0.0.987/86991]=0.000384 95% C/I- 0.013-0.000753If you want to line a safe essay, order it on our website: BestEssayCheap.com

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