Use the Following Information for Questions

Multiple Choice

Use the following information for questions:
In a random sample of 250 full time students, 80% preferred to have three one-hour lectures per week rather than two 90-minute lectures. In a random sample of 500 part-time students, 50% said they preferred the three one-hour lectures schedule. The difference between the two sample proportions (full-time - part-time) is to be calculated.
-What is the standard error for the difference between the two sample proportions?

A) 0.0011
B) 0.0338
C) 0.0553
D) 0.6000