A librarian wants to know if their students use the university library more than the public libraries in the district. She collected the number of hours spent in the library each day from five students: 4, 8, 3, 1, 7. Select all steps for estimating the population variance of the distribution of scores? Select Answer(s) Compute the mean Take the deviation Compute the sum of squares Divide the sum of squares by the degrees of freedom Divide the sum of squares by the sample size