{"id":130156,"date":"2022-10-20T00:00:00","date_gmt":"2022-10-20T00:00:00","guid":{"rendered":"https:\/\/nursingstudybay.com\/2022\/10\/20\/comm-291-assignment-4-problems\/"},"modified":"2022-10-20T00:00:00","modified_gmt":"2022-10-20T00:00:00","slug":"comm-291-assignment-4-problems","status":"publish","type":"post","link":"https:\/\/www.studyproessays.com\/help\/comm-291-assignment-4-problems\/","title":{"rendered":"COMM 291 Assignment 4 Problems"},"content":{"rendered":"<p>Question4:AngusReidStrategiessurveyed1016Canadianadults(assumea50\/50splitbetween\u00a0menandwomen)andfoundthat65%ofmenand45%ofwomensupportscrappingthepenny.a) Constructa90%confidenceintervalforthedifferenceinsupportforscrappingthepennybetweenmenandwomen.b) Constructa99%confidenceintervalforthedifferenceinsupportbetweenmenandwomen.c) Interpretthemeaningofthefactthatoneoftheseconfidenceintervalsiswiderthantheother.Question5:In2008,aGallupPollasked2336U.S.adultsaged18oroverhowtheyratedeconomicconditions.InapollconductedfromJanuary27throughFebruary1,2008,24%ratedtheeconomyasExcellent\/Good.ArecentmediaoutletclaimedthatthepercentageofAmericanswhofelttheeconomywasinExcellent\/Goodshapewas,infact,28%.DoestheGallupPollsupportthisclaim?a) Finda95%confidenceintervalforthesampleproportionofU.S.adultswhoratedtheeconomyasExcellent\/Good.Checkconditions.b) Doesyourconfidenceintervalprovideevidencetosupporttheclaim?c) Whatisthesignificancelevelofthetestinpartb)?Explain.Question6:ThesameGallupPolldatafromQuestion5alsoreportedthat33%ofthosesurveyedratedtheeconomyasPoor.Thesamemediaoutletclaimedthetrueproportiontobe30%.DoestheGallupPollsupportthisclaim?a) Finda95%confidenceintervalforthesampleproportionofU.S.adultswhoratedtheeconomyasPoor.Checkconditions.b) Doesyourconfidenceintervalprovideevidencetosupporttheclaim?c) Whatisthesignificancelevelofthetestinpartb)?Explain.Question7:Acompanywithalargefleetofcarshopestokeepgasolinecostsdownandsetsagoalofattainingafleetaverageofatleast26milespergallon.Toseeifthegoalisbeingmet,thecompanychecksthegasolineusagefor50companytripschosenatrandom,findingameanof25.05mpgandastandarddeviationof4.83mpg.Isthisstrongevidencethatthecompanyhasfailedtoattainitsfueleconomygoal?a) Writeappropriatehypotheses.b) Arethenecessaryassumptionstoperforminferencesatisfied?c) TestthehypothesisandfindthePvalued) ExplainwhatthePvaluemeansinthiscontext.e) Stateanappropriateconclusion.Question8:During200811,ViaRailinstallednewpassingtracksandaCentralizedTrafficControlsystemonthelinebetweenKingstonandOttawainordertoreducedelays.Supposethat,beforetheimprovements,trainsbetweenKingstonandOttawawereonaverage12.4minuteslate.Aftertheimprovements,aconsumergroupmonitoreddelaysduringaperiodofthreemonths.Forarandomsampleof35trains,itfoundtheaveragedelaytobe6.2minuteswithastandarddeviationof8minutes.Theimprovementsreduceddelaysbyhalf,theyclaimed.a) Haveaveragedelaysbeenreduced?StateyourhypothesesandcalculateaPvalue.Stateanyassumptionsyouremakingandwhethertheyrelikelytobetrue.b) Calculatethe95%confidenceintervalforthedelaysaftertheimprovements,assumingtheconditionsaresatisfied.Commentonvalidityofyourconfidenceinterval.c) Commentontheethicsoftheconsumergroupsstatement.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Question4:AngusReidStrategiessurveyed1016Canadianadults(assumea50\/50splitbetween\u00a0menandwomen)andfoundthat65%ofmenand45%ofwomensupportscrappingthepenny.a) Constructa90%confidenceintervalforthedifferenceinsupportforscrappingthepennybetweenmenandwomen.b) Constructa99%confidenceintervalforthedifferenceinsupportbetweenmenandwomen.c) Interpretthemeaningofthefactthatoneoftheseconfidenceintervalsiswiderthantheother.Question5:In2008,aGallupPollasked2336U.S.adultsaged18oroverhowtheyratedeconomicconditions.InapollconductedfromJanuary27throughFebruary1,2008,24%ratedtheeconomyasExcellent\/Good.ArecentmediaoutletclaimedthatthepercentageofAmericanswhofelttheeconomywasinExcellent\/Goodshapewas,infact,28%.DoestheGallupPollsupportthisclaim?a) Finda95%confidenceintervalforthesampleproportionofU.S.adultswhoratedtheeconomyasExcellent\/Good.Checkconditions.b) Doesyourconfidenceintervalprovideevidencetosupporttheclaim?c) Whatisthesignificancelevelofthetestinpartb)?Explain.Question6:ThesameGallupPolldatafromQuestion5alsoreportedthat33%ofthosesurveyedratedtheeconomyasPoor.Thesamemediaoutletclaimedthetrueproportiontobe30%.DoestheGallupPollsupportthisclaim?a) Finda95%confidenceintervalforthesampleproportionofU.S.adultswhoratedtheeconomyasPoor.Checkconditions.b) Doesyourconfidenceintervalprovideevidencetosupporttheclaim?c) Whatisthesignificancelevelofthetestinpartb)?Explain.Question7:Acompanywithalargefleetofcarshopestokeepgasolinecostsdownandsetsagoalofattainingafleetaverageofatleast26milespergallon.Toseeifthegoalisbeingmet,thecompanychecksthegasolineusagefor50companytripschosenatrandom,findingameanof25.05mpgandastandarddeviationof4.83mpg.Isthisstrongevidencethatthecompanyhasfailedtoattainitsfueleconomygoal?a) Writeappropriatehypotheses.b) Arethenecessaryassumptionstoperforminferencesatisfied?c) TestthehypothesisandfindthePvalued) ExplainwhatthePvaluemeansinthiscontext.e) Stateanappropriateconclusion.Question8:During200811,ViaRailinstallednewpassingtracksandaCentralizedTrafficControlsystemonthelinebetweenKingstonandOttawainordertoreducedelays.Supposethat,beforetheimprovements,trainsbetweenKingstonandOttawawereonaverage12.4minuteslate.Aftertheimprovements,aconsumergroupmonitoreddelaysduringaperiodofthreemonths.Forarandomsampleof35trains,itfoundtheaveragedelaytobe6.2minuteswithastandarddeviationof8minutes.Theimprovementsreduceddelaysbyhalf,theyclaimed.a) Haveaveragedelaysbeenreduced?StateyourhypothesesandcalculateaPvalue.Stateanyassumptionsyouremakingandwhethertheyrelikelytobetrue.b) Calculatethe95%confidenceintervalforthedelaysaftertheimprovements,assumingtheconditionsaresatisfied.Commentonvalidityofyourconfidenceinterval.c) Commentontheethicsoftheconsumergroupsstatement.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8827,10099,10540,10536,10892,10538,10539,10537,10891],"tags":[10549,10616,10615,7687,10627,8857,10552,10295,10548,10622,8907],"class_list":["post-130156","post","type-post","status-publish","format-standard","hentry","category-australia-essays","category-buy-essay","category-cheap-essay-writers","category-get-assignments-done","category-page-paper","category-phd-essay-writers","category-research-paper-writing-service-for-any-topic","category-study-bay-essay","category-write-my-assignment-ireland","tag-ai-plagiarism-free-essay-writing-tool","tag-australian-best-tutors","tag-best-trans-tutors","tag-buy-essay-uk","tag-cheap-dissertation-writer","tag-help-with-writing-an-essay","tag-help-write-my-paper-ai-free","tag-homework-for-you","tag-online-essay-writers","tag-phd-essays","tag-write-my-essay-for-me"],"_links":{"self":[{"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/posts\/130156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/comments?post=130156"}],"version-history":[{"count":0,"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/posts\/130156\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/media?parent=130156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/categories?post=130156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.studyproessays.com\/help\/wp-json\/wp\/v2\/tags?post=130156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}