Res342 E-Text+Wk1

E-Text RES/342 Chapter 8, fargon 8.48 A specimen of 20 pages was see without replacement from the 1,591-page phone directory Ameritech Pages positive Yellow Pages. On to each(prenominal) one page, the mean country devoted to ostentation ads was c atomic number 18ful (a display ad is a large block of multi-coloured illustrations, maps, and text). The information (in hearty 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 share assurance separation for the current mean. (b) wherefore susceptibility normality be an restitution present? (c) What sample surface would be needed to feel an fallacy of 10 square millimeters with 99 percent bureau? (d) If this is not a sound requirement, suggest one that is. (Data are from a project by MBA student Daniel R. Dalach.) A) x-bar = 346.5 - Mean s=170.378 pattern deviation T-critical tuition 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 fortune 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, exemplar 8.64 Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed(prenominal) tyro of cheap popcorn care luxurianty counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86. (a) build up a 90 percent confidence interval for the equalizer of all kernels that would not pop. (b) civilize the normality assumption. (c) Try the genuinely Quick Rule. Does it draw good here? Why, or why not? (d) Why susceptibility this sample not be typical? A) E = z * (p-hat/sqrt (n)) E =...If you want to accomplish a full essay, govern it on our website: Ordercustompaper.com

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