Suppose we wish to calculate the variance $($the formula for variance is shown above$).$ The next few questions will help you break the solution down into steps.

The first step is to subtract x$\_$i from x$-$bar, but to do that, we need to recognize what each x$\_$i is$.$ For example, what is x$\_1?$ For the sake of simplicity, suppose you have a small sample $5\mathrm{.}04$ kg$,5\mathrm{.}08$ kg$,5\mathrm{.}21$ kg$.$