A study of all the students at a small college showed a mean age of 20.4 and a standard deviation of 2.7 years a. Are these numbers statistics or parameters? Explain. b. Label both numbers with their appropriate symbol (such as x, , s, or s). a. Choose the correct answer below. O A. The numbers are statistics because they are estimates and not certain. O B. The numbers are parameters because they are estimates and not certain. O C. The numbers are parameters because they are for all the students, not a sample. O D. The numbers are statistics because they are for all the students, not a sample.