MAT220 33 statistics I (MOD26 ONLINE (10/23-12/17/1 Homework: UNIT 5 - Section 8

Question

MAT220 33 statistics I (MOD26 ONLINE (10/23-12/17/1 Homework: UNIT 5 - Section 8.2 Homework Score: 0 of 1 pt 8.2.23 Hw score: 41.67%, 3.33 of 8 pts Quasnon Heep * A researcher studyng public opinion of proposed Social Secunty changes obtars a simple random sample of 25 adut Amencans and asks them whothor or nol they support the proposed changes To say thst the destribuhon of the sample propordon of adults who respond yes, s approxcmalely noemal, how many more adult Amencans does the rescoarcher nood to sample in the tolowing cases? (al 15% ot all adit Amencans support he changes (D) 20% of all adut Amencans surport h8 changes Cal The researcher must ask more Amercan aduts (Round up to te naarest ning r )

Explanation / Answer

8.2.23.

Given that, random sample of 25 adult americans
15% adult american support the changes
sample one, x1 =3.75, n1 =25, p1= x1/n1=0.15
20% adult american support the changes
sample two, x2 =5, n2 =25, p2= x2/n2=0.2
reseacher must ask (X2-X1 = 5-3.75 = 2.75) approximate = 3 more adult americans

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