In a recent study of the prevalence of sexually transmitted diseases, a simple random sample of 35,000 Americans were selected and it was found that 20.1% reported having at least one STD. A hypothesis test for a difference from the expected 20% was found to be highly significant, though the difference is quite small. The explanation is that

A. it was an aberrant sample.
B. the sample size is very large.
C. the value of 20.1% is large compared to the hypothesized value of 20%.
D. All of the above

Question

In a recent study of the prevalence of sexually transmitted diseases, a simple random sample of 35,000 Americans were selected and it was found that 20.1% reported having at least one STD. A hypothesis test for a difference from the expected 20% was found to be highly significant, though the difference is quite small. The explanation is that

A.	it was an aberrant sample.
B.	the sample size is very large.
C.	the value of 20.1% is large compared to the hypothesized value of 20%.
D.	All of the above