Cost (in cents) per ounce of sliced Swiss cheese Deviation from the Mean (x - x) Squared Deviation from the Mean (x - x) 2 26 -26 676 63 11 121 37 -15 225 41 -11 121 70 18 324 83 31 961 48 -4 16 51 -1 49 -3 Since there are nine different brands of Swiss cheese represented In the sample, n = Substitute n and the squared deviations into the formula and simplify to obtain the sample variance. $2 _ _(x - x) 2 n - 1 676 + 121 + 225 4 121 4: 324 4 961 + 16 + 149