The Official Four-Year Graduation Rate Among US Colleges and Universities

The official four-year graduation rate among US colleges and universities is 57.6%. Suppose a researcher takes a random sample of 100 college students and tracks their progress through school to determine whether each student graduates in four years or not. Which of the following do you know to be true? Select all that apply.

A) If many samples of 100 students were taken, the distribution of the sample proportions would be bell-shaped and symmetric.
B) If many samples of 100 students were taken, the distribution of the sample proportions would be centered at 0.576.
C) The sample proportion collected by the researcher would be 0.576.
D) If many samples of 100 students were taken, the standard deviation of the sample proportions would be 0.049.