Quiz: W2: Assignment 3 Quiz survey of 1017 peopie, 71d sad thal Tvey voled in th

Question

Quiz: W2: Assignment 3 Quiz survey of 1017 peopie, 71d sad thal Tvey voled in the election bs thes resun consesienk wth the sumeut, or s (hes res appear that accurate waling siats can be oteaned by iniking volrs how thry ace? sn oty to oour with aned ot rso why o hy siret in hee mss on t -12 14 (Round to one decimal place as neoded.j b. is the resul of 714 vong r, e esection usua·or umeuar? O A. This resut ts nusual because 714 & below the minu e walue B. This result is unusu" because 7145 within the range of O c. This result is unusual because 714 s greater han the masimum uveat va O D. Thhs resut is usuat because 714 is wthin the sange of usual vakues rvcial w c. Does it appear thar acurate votng eesuts can be obtsned ty asking vobers terw they acledr) Click to select your answerls) O Type here to search

Explanation / Answer

a)

Mean =n*p = 1017 *(0.72) =732.24 = 732.2 [rounded to one decimal]

SD =[np(1-p)] = [1017 *(0.72)(1-0.72)] =14.3188 = 14.3 [rounded to one decimal]

b)

z= (714 -732.2)/14.3

= -1.27

since it is less than -2 SD, it is usual.

Option D is correct

c)

No, because it appears that substantially fewer people say that they voted than the proportion of people who actually did vote

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.