Question 7: We want to determine whether patients using Aetna insurance are billed a higher amountthanpatientsusingMedicare. Dotheappropriatetestandinterpretitsresults(significance level=5%).

Question8:WewanttoinvestigatetherelationshipbetweentheAgeofthepatientandtheamount billed totheirhealthinsurance provider. At thesignificance level of 5%, dothe appropriate test and interpret its results.Clearly stateyour conclusion regarding the relationship between these variables.