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Safari File Edit View History Bookmarks Window Help 94 ], Thu 7:12 PM QOE chegg.com Course Home Your question was answered sky723@vols.utk.... Chegg Study Guided Solutions and Study H.. Safari File Edit View History Bookmarks Wind.+ ? mathxl.com E Chegg Study 5 PM Stat 201 Spring 2018-Brian J. Stevens Homework: ELQ - Proportion Confidence Intervals Score: 0 of 1 pt Section 16.3 Exercise 5-T lexi alberts4/5/18 7:12 PM Show transcribed image text Save 3 of 25 (17 complete) HW Score: 58.67%, 14.67 of 25 pts Expert Answer Question Help * sagartilekar answered this Apolling company conducts an annual poll of adults about political opinions. The survey asked a random sample of 381 adults whether they think things in the country 4,305 answers Two tailed critical value at Sample proportion P 0 are going in the right direction or in the wrong direction, 70% said that things were going in the wrong direction. Complete parts a and b below. a) Calculate the margin of error for the proportion of al adults who think things are going in the wrong direction for 90% confidence ME-039 (Round to three decimal places as needed.) b) Would the margin of error be larger or smaller for 99% confidence? Explain. O A. To be more confident, the interval needs to contain the true proportion more often, so the margin of error would be smaller O B. To be more confident, the interval needs to contain the true proportion less often, so the margin of error would be smaller 1.645 0.039 ME 0.039 Comment Sqrt( 0.70-o.30 PM C. To be more confident, the interval needs to contain the true proportion more often, so the margin of error would be larger O D. To be more confident, the interval needs to contain the true proportion less often, so the margin of error would be larger Click to select your answer and then click Check Answer 3c 163 All parts showing Clear All Check Answer

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(b) Ans : Option C.

(As the confidence level increases, margin of error also increases)   

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