A Randomly Selected Sample of 60 Mathematics Majors Spent an Average

Multiple Choice

A randomly selected sample of 60 mathematics majors spent an average of $200.00 for textbooks one term, while during the same term, a randomly selected sample of 40 literature majors spent an average of $180.00 for textbooks. The standard deviation for each sample was $20.00. The standard error for the difference between the two sample means is

A) 0.057
B) 4.082
C) 5.744
D) 16.663