rences Mailings Review View Help Design Layout Tell me what y IV. A researcher was interested in whether people would buy a different average number of items depending upon what music was playing. One group heard Christmas music, one heard pop music, and one heard no music. Hand calculate and determine whether the groups significantly differed using the critical value table. Report in APA format. Christmas Music Pop Music No Music 5 3 6 3 5 3 2 4 2 4 3 1 1 6 N N