A survey of 100 random full-time students at a large university showed the mean number of semester units that students were enrolled in was 17.6 with a standard deviation of 0.8 units. a. Are these numbers statistics or parameters? Explain. b. Label both numbers with their appropriate symbol (such as x, y, s, or o). a. Choose the correct answer below. A. The numbers are statistics because they are estimates and they are biased. B. The numbers are parameters because they are estimates and they are biased. C. The numbers are statistics because they are for a sample of students, not all students. D. The numbers are parameters because they are for a sample of students, not all students. b. Choose the correct labels below. _____ = 17.6 _____ = 0.8