Exercises

Sample variance

In these exercises you have a number of observations $x_{1}, x_{2}, . . ., x_{n}$ . You see your observations in the table to the right.

Your task is to calculate the sample variance $s_{x}^{2}$ .

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Below are the values $x_{1}, x_{2}, . . ., x_{n}$ .

The mean is $\bar{x} = 66.65$ . Calculate the sample variance $s_{x}^{2}$ .

Explain

The sample variance $s_{x}^{2}$ is

400.19

343.49

38.38

463.57

334.65