A Marketing Manager Studied the Effect of Packaging on Sales

Multiple Choice

A marketing manager studied the effect of packaging on sales. Four designs were chosen: design 1 had three colors, design 2 had three colors and cartoons, design 3 had five colors, and design 4 had five colors and cartoons. The ANOVA table below analyzes the effects of varying the number of colors and adding cartoons on sales. This is an example of a two-factor factorial design. Analysis of Variance for Sales The estimate of the standard deviation  is given by:

A) 9.9.
B) 3.15.
C) 158.4.
D) 10.23.