Calculate the variance and standard deviation of the following sample: 2, 3, 3, 3, 4. (These data are entered into an Excel spreadsheet, shown in Figure 2.20.)

Data from figure 2.20

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1 2 3 4 5 96 A 7 8 Sum 9 10 11 12 13 B X 23 3 3 4 15 D C (X-Xbar) (X-Xbar)² 0 0 0 1 0 Variance Std. Dev. 1 0 0 0 1 2 0.5 0.71 E