The big box electronics store, Good Buy, needs your help in applying Principal Components Analysis to their appliance sales data. You are provided records of monthly appliances sales (in thousands of units) for 100 different store loca- tions worldwide. A few rows of the data are shown to the right. Suppose you perform PCA as follows. First, you standardize the 3 numeric features above (i.e., transform to zero mean and unit variance). Then, you store these standardized features into X and use singular value decomposition to com- pute X = UEV^T
monitors televisions computers
location
Bakersfield 5 35 75
Berkeley 4 40 50
Singapore 11 22 40
Paris 15 8 20
Capetown 18 12 20
SF 4th Street 20 10 5
What is the dimension of U? O A. 3 x 100 OB. 100 x 3 O C.3x3 O 6 O D. 6 x 3