25points please help!!!!
The final exam grade distribution for all students in the introductory statistics class at a local community college is displayed in the table, with A = 4, B = 3, C = 2, D = 1, and F = 0. Let X represent the grade for a randomly selected student from the class.


Which statement correctly interprets the standard deviation?

The grade for a randomly selected student would typically vary from the expected grade by 1.16.
The grade for a randomly selected student would typically vary from the expected grade by 1.08.
The mean grade for a randomly selected student would typically vary by 1.16 from the expected grade.
The mean grade for a randomly selected student would typically vary by 1.08 from the expected grade.