Based on Her Past Experience, a Professor Knows That the Probability

Multiple Choice

Based on her past experience, a professor knows that the probability distribution function for X = number of students who come to her office hours on any given Wednesday is given below.
-The standard deviation of X is 0.96. Interpret this value in the context of the problem.

A) If you were to observe many students, the average number of students that visit office hours is 0.96.
B) If you were to observe many Wednesdays, the average number of students that visit office hours is 0.96.
C) On average, the number of students that visit office hours will deviate from the mean by about one student.
D) Next Wednesday, we expect one student to visit office hours.