Question

41. A sample of 12 books by the same author had a mean number of pages of 215 and a standard devi pages in this author's books. State what this means in the context of the problem. ation of 14 pages. Find a 90% confidence interval for the average number of 22. An October 2003 Gallup poll, 784 of 1006 randomly selected adults stated they think the government should make partial birth abortions illegal, except in cases necessary to save the life of the mother. Find a 95% confidence interval for the proportion of adults who think partial birth abortions should be illegal except in cases necessary to save the life of the mother. State what this means in context of the problem.

Answer 1

n=12 "To ffnd ue ha q。ソ.confidence ?nterAod ) (21s 7.2580 ラ (207-742, 222-2580) There wa 90%, chance thaf -tho cone,dene ptezuou aontaos the rue population mean . There-E5 gpad reason to belfve that t he popwation mean lies behocen these tuo bound

n -100G q5% confidence ,aterial coo ngable 00 1072 1.96 XO-0131) C0.73 t 0.0256) → (0.7544, 0.30.56 → We ate q5% confident Har the Proporion ot au adults toho Phink PatHol birth abor ions should to sauo the e of the mather bekoe en (O。7544) 2 (0.8056)