Examine their daily trading volume for the same five days.

a. What are the average volumes for the two samples?

b. Would you expect this difference to have an impact on the efficiency of the markets for the two samples? Why or why not?

SAMPLE A	TRADING VOLUME
	30-Jan	31-Jan	1-Feb	2-Feb	3-Feb
Merck	7,853,600	9,821,100	11,018,800	18,990,200	11,650,500
Caterpillar	5,221,800	5,724,700	3,582,500	3,807,500	4,677,900
Intel	23,954,700	27,059,100	28,380,600	31,916,900	21,038,100
McDonalds	3,778,000	3,733,300	3,233,400	3,236,600	3,183,000
General Electric	26,211,800	38,703,400	25,682,300	21,709,500	31,104,300
SAMPLE B	TRADING VOLUME
	30-Jan	31-Jan	1-Feb	2-Feb	3-Feb
AMAZON	3,747,300	3,137,200	3,850,200	7,350,500	10,868,800
APPLE	30,377,500	49,201,000	111,985,000	33,710,400	24,507,300
HP	9,345,200	12,485,400	9,739,700	8,296,900	13,433,300
GOOGLE	3,246,600	2,160,600	2,029,700	1,532,100	1,463,400
YAHOO	6,906,100	5,153,500	5,306,400	5,064,400	6,422,400