Question $17$

$5$ pts

BigShots, Inc. is a specialty e$-$tailer that operates $87$ catalog websites on the Internet. Kevin Conn, Sales Director, feels that the style $($color scheme, graphics, fonts, etc.$)$ of a website may affect its sales. He chooses three levels of design style $($neon$,$ old world and sophisticated$)$ and randomly assigns six catalog websites to each design style. Kevin's experimental design is a $$

normalized block design

factorial design

completely randomized design

randomized block design