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2.AprofessorofEducationisinterestedintherelationshipbetweenstudents'visitsto officehoursheldbyprofessorsandtheirfinalgradesinthecourse.Shehasobtained sampledatafromHardknocksUniversityregardingthesetwovariables.Thesedataare cross-tabulatedbelow. VisitsDuringOfficeHouses Grade Corworse B A None 527 512 480 OneorTwo ThreeorMore 540438 526465 509511 Shehypothesizesthatthemorevisitsmadebyastudenttoofficehours,thehigherthe likelygrade.Calculatethechi-squarestatisticsforthistable.Arethetwovariablesrelated inallstudents?Explainyouranswer.

2.AprofessorofEducationisinterestedintherelationshipbetweenstudents'visitsto

officehoursheldbyprofessorsandtheirfinalgradesinthecourse.Shehasobtained

sampledatafromHardknocksUniversityregardingthesetwovariables.Thesedataare

cross-tabulatedbelow.

VisitsDuringOfficeHouses

Grade

Corworse

B

A

None

527

512

480

OneorTwoThreeorMore

540438

526465

509511

Shehypothesizesthatthemorevisitsmadebyastudenttoofficehours,thehigherthe

likelygrade.Calculatethechi-squarestatisticsforthistable.Arethetwovariablesrelated

inallstudents?Explainyouranswer.

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