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Sample Variance | Variance and Standard Deviation
Learning Statistics with Python
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Contenido del Curso

Learning Statistics with Python

Learning Statistics with Python

1. Basic Concepts
2. Mean, Median and Mode with Python
3. Variance and Standard Deviation
4. Covariance vs Correlation
5. Confidence Interval
6. Statistical Testing

bookSample Variance

Now let's delve into sample variance. The definition is similar to that of population variance, but the formula differs.

Formula

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

salaries_distribution

The variance of the column 'salary_in_usd' is 5034932663.18

Variance Key Note

We can see that the variance of the 'salary_in_usd' column is quite substantial. The values in this column are spread out a lot.

Note

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

Select the one with lower variance from the graphs with an equal number of observations and identical mean values.

Select the one with lower variance from the graphs with an equal number of observations and identical mean values.

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Sección 3. Capítulo 2
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