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
+5
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