Now it's time to talk about sample variance. The definition is the same as for the population, but the formula varies.

Formula

Look at the example of variance rounded to the two decimal points for the column columns 'salary_in_usd':

The variance of the column "salary_in_usd" is 5034932663.18

Variance Key Note

We can see that the variance of the column salary_in_usd is large. The values in the column salary_in_usd are spread out a lot. It is time to make an important note.

The larger the variance, the more the values are scattered.

Choose the one with a smaller variance among the graphs with an equal amount of observations and the same mean values.

Select the correct answer

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