A Random Sample of 40 Men Drank an Average of 20

Multiple Choice

A random sample of 40 men drank an average of 20 cups of coffee per week during finals, while a sample of 30 women drank an average of 15 cups of coffee per week. The sample standard deviations were 6 cups for the men and 3 cups for the women. The standard error for the difference between the two sample means is

A) 1.095
B) 1.200
C) 1.549
D) 2.400