Aprincipal wants to know the grade point average of the 2,500 students enrolled at his high school. he randomly selects 500 students and assures that the randomly selected students accurately represent all students at his school. the principal finds the sample students' grade point average to be between 2.85 and 3.25. what assumption can be made regarding the approximate grade point average of all student enrolled at his high school? a. no assumptions can be made regarding the grade point average of all students because there is not enough information. b. the approximate grade point average of all students falls between 2.85 and 3.25. c. no assumptions can be made regarding the grade point average of all students because the sample size is too small. d. the approximate grade point average of all students is greater than 3.25.