The daily volume of a stock represents the total number of shares traded in the stock. The following data represent the daily volume (in millions) of General Electric (GE) Corporation stock and Pfizer stock for 13 randomly selected days in 2010.

(a) What conditions must be satisfied to conduct the appropriate test to determine if the daily volume of General Electric Corporation stock is greater than that of Pfizer?

(b) Assuming that the conditions from part (a) are satisfied, determine if the daily volume of General Electric Corporation stock is greater than that of Pfizer. Use the α = 0.05 level of significance.

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Date 10/25 11/3 11/5 11/23 11/29 12/1 12/6 12/9 12/13 12/22 12/30 Volume of GE (millions) 53.6 65.8 69.8 46.6 36.3 55.9 56.5 68.9 58.8 39.1 67.9 43.0 28.9 Volume of Pfizer (millions) 67.3 50.5 57.5 44.2 37.8 39.7 39.1 44.8 53.3 31.7 47.2 35.7 29.8