THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Essay

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
An airline is considering changing the color scheme of its planes' interiors.A focus group of 220 people was asked which color scheme they preferred.Of those who expressed a preference,87 preferred the new color scheme,while 121 preferred the old.
-The introduction of the new blue M&M has been received very well.In fact,the brand manager for M&M wants to add a color and is trying to decide which color to add.The manager asks a group of 12 life-long consumers of M&Ms to rank these colors on a scale of 1 to 10.The data is presented below:
Consumers of M&Ms

Using the Wilcoxon signed rank test,is there evidence that consumers' rankings were higher for one color or the other? State any assumptions needed to answer this question.