Res342 E-Text+Wk1

E-Text RES/342 Chapter 8, fare 8.48 A sample of 20 pages was interpret without replacement from the 1,591-page ph matchless directory Ameritech Pages Plus Yellow Pages. On to each(prenominal) one page, the mean area devoted to ostentation ads was thrifty (a display ad is a large block of piebald illustrations, maps, and text). The information (in square millimeters) are shown below: 0 260 356 403 536 0 268 369 428 536 268 396 469 536 162 338 403 536 536 130 (a) prepare a 95 pct faith musical interval for the current mean. (b) wherefore might normality be an issue present? (c) What sample size would be call for to obtain an fallacy of 10 square millimeters with 99 percent trust? (d) If this is non a reasonable requirement, suggest one that is. (Data are from a project by MBA student Daniel R. Dalach.) A) x-bar = 346.5 - mean(a) s=170.378 Standard deviation T-critical c are for for 95% CI with df =19= 2.093 E= 2.093 * 170.378/sqrt (20)=2.0931.96 * 38.0976 = 79.74 95% CI: (346.5 79.74, 346.5 + 79.74) = 426.240 upper confidence limit = 366.760 lower confidence limit B) A CI statement is about the whole population. This random sample is in all probability not the whole population. C) n = (t * s / E) n = (2.576*170.378/10)^2 = 1926.067 n = 1927 D) Increase E or decrease the confidence level Chapter 8, Exercise 8.64 Biting an unpopped aggregate of popcorn hurts! As an experiment, a self-confessed(prenominal) connoisseur of cheap popcorn care luxurianty counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. in that respect were 86. (a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. (b) Che ck the normality assumption. (c) hear the V! ery Quick Rule. Does it draw well here? Why, or why not? (d) Why might this sample not be typical? A) E = z * (p-hat/sqrt (n)) E =...If you call for to get a full essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper