BigShots,Inc $\alpha$ = 005,the Critical F Value Is _____________

Multiple Choice

BigShots,Inc.is a specialty e-tailer that operates 87 catalog Web sites on the Internet.Kevin Conn,Sales Director,feels that the style (color scheme,graphics,fonts,etc.) of a Web site may affect its sales.He chooses three levels of design style (neon,old world and sophisticated) and randomly assigns six catalog Web sites to each design style.Analysis of Kevin's data yielded the following ANOVA table.
Using $\alpha$ = 0.05,the critical F value is _____________.

A) 3.57
B) 19.43
C) 3.68
D) 19.45
E) 2.85