Question: 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...

I assume I use the formula

S^2 = (x- X hat)^2 / n-1

However I don't know which figures to sub. into the equation.  Edit

Answer: S^2 = summation(x- X hat)^2 / (n-1)

x hat= (0+2+ 4+ 7+2+9)/6=4

S^2=[(0-4)^2+(2-4)^2+(4-4)^2+(7-4)^2+(2-4)^2+(9-4)^2]/(6-1)=11.6 (Ans.)  Edit