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Week 1: soulfulness E-text Chapter exercise 8.48 A gusto of 20 pages was taken without heir from the 1,591-page phone directory Ameritech Pages Plus yellowish Pages. On each page, the average bea devoted to ground ads was measured (a display ad is a large suffocate rule of multicolored illustrations, maps, and text). The selective information (in second office 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) fabricate a 95 portion boldness detachment for the true mean. Mean +/- [z(sigma/(n^.5))]= 346.5 +/- [1.96 (170.37837/(20^.5))]= 346.5 +/- [74.67221] = 421. 17 < mu< 271.83 (b) Why competency northward be an issue present? Normality major power be an issue because the choosing of pages may non have been make under random conditions. (c) What savour size would be needful to grow an error of °æ10 square(p) millimeters with 99 share confidence? Error= t x standard aside/ (n^.5) 10= 2.575 x 170.37837/ (n^.5) n^.5= 438.7243/10 n= (43.8743)^2= 1924.79= 1925 rounded, would be the sample size to obtain an error of +/- 10 square mm with 99% CI (d) If this is not a reasonable need, strike up up one that is. If this is not a reasonable need thus I give the sack suggest trying to belittle the requirement of the confidence. Chapter exercise 8.

64 nipping an unpopped kernel of popcorn hurts! As an experiment, a self-confessed tyro of cheap popcorn conservatively counted 773 kernels and position them in a popper. After popping, the unpopped kernels were counted. There were 86. (a) Construct a 90 share confidence interval for the simile of either kernels that would not pop. p= 86/773=0.1113, q=1-p=0.8887, z=1.645 for 90%CI, p-z x [(pq/N)^.5] to p + z x [(pq/N)^0.5) 0.1113-1.645 [(0.1113 x 0.8887/773)^.5] to 0.1113 + 1.645 [(0.1113 x 0.8887/773)^.5] 0.09269 to 0.12991 (b) square off the normality assumption. pn= (p-hat)x n= (86/773)773>5; nq= (687/773)773>5; Normality go onward be present because twain pn and nq are...If you want to get a full essay, order it on our website: Ordercustompaper.com

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