Simon Arnett, Director of Human Resources, is exploring employee absenteeism at the Buderim Bottling during the last operating year. A sample of six personnel records produced the following data  0, 2, 4, 7, 2, 9. The variance of the number absences per employee is ______.A 11.6 B 9.67 C 3.41 D 3.11 答案  11.6