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A randomly selected sample of 60 mathematics majors spent an average of $200 for math textbooks...

A randomly selected sample of 60 mathematics majors spent an average of $200 for math textbooks one term, while during the same term, a randomly selected sample of 40 English majors spent an average of $180 for required literature. The standard deviation for each sample was $20. The standard error for the difference between the two sample means is

A.

60.166
B.

4.36
C.

4.082
D.

0.913
math   Statistics-And-Probability   
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