Hope Williams, Marketing Manager of RightAid Pharmacy, Inc

Multiple Choice

Hope Williams, Marketing Manager of RightAid Pharmacy, Inc., wants a regression model to predict sales in the greeting card department.Her data set includes two qualitative variables: the pharmacy neighbourhood (urban, suburban, and rural) , and lighting level in the greeting card department (soft, medium, and bright) .The number of dummy variables needed for "lighting level" in Hope's regression model is ___.

A) 1
B) 2
C) 3
D) 4
E) 5