A mail-order catalog firm designed a factorial experiment to test the effect of the size of a magazine advertisement and the advertisement design on the number of catalog requests received (data in thousands). Three advertising designs and two different-size advertisements were considered. The data obtained follow. Use the ANOVA procedure for factorial designs to test for any significant effects due to type of design, size of advertisement, or interaction. Use alpha=0.05.

Show your ANOVA result and answer the following:

(a) Is the effect of advertisement size significant (i. e., are averages for advertisement size not the same?)
(b) Is the effect of design significant?

Size of Advertisement
Design Small Large
A 8 12
12 8
B 22 26
14 30
C 10 18
18 14