The Substance data fileatthebookswebsiteshowsacontingencytableformedfromasurvey that askedasampleofhighschoolstudentswhethertheyhaveeverusedalcohol,cigarettes, and marijuana.Constructa95%Waldconfidenceintervaltocomparethosewhohaveusedor not usedalcoholonwhethertheyhaveusedmarijuana,using (a) formula(4.13); (b) software. State assumptionsforyouranalysis,andinterpretresults.

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The Substance data fileatthebook’swebsiteshowsacontingencytableformedfromasurvey that askedasampleofhighschoolstudentswhethertheyhaveeverusedalcohol,cigarettes, and marijuana.Constructa95%Waldconfidenceintervaltocomparethosewhohaveusedor not usedalcoholonwhethertheyhaveusedmarijuana,using

(a) formula(4.13);

(b) software.

State assumptionsforyouranalysis,andinterpretresults.

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