Medical Wonders Is a Specialized Interior Design Company Focused on Healing

Multiple Choice

Medical Wonders is a specialized interior design company focused on healing artwork.The CEO,Kathleen Kelledy claims that artwork has healing effects for patients staying in a hospital,as measured by reduced length of stay.Her current client is a children's cancer hospital.Kathleen is interested in determining the effect of three different pieces of healing artwork on children.She chooses three paintings (a horse photo,a bright abstract,and a muted beach scene) and randomly assigns six hospital rooms to each painting.Analysis of Kathleen's data yielded the following ANOVA table.
Using $\alpha$ = 0.05,the critical F value is _____________.

A) 13.68
B) 19.43
C) 3.59
D) 19.45
E) 3.68