Which of the following statements are true? I. The sampling distribution of a has standard deviation even if the population is not normally distributed. Vn II. The sampling distribution of a is normal...

Extracted text: Which of the following statements are true? I. The sampling distribution of a has standard deviation even if the population is not normally distributed. Vn II. The sampling distribution of a is normal if the population has a normal distribution. III. When n is large, the sampling distribution of is approximately normal even if the the population is not normally distributed. OI and II Ol and III O Il and III O1, II, and II O None of the above gives the complete set of true responses.