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# Descriptive statistics

Descriptive statistics is the discipline of statistics, where information and features, which explain the essence of data, are extracted and analyzed. This part is very important, as it helps us estimate the shape and features of data for model and algorithm selection.

You have to have the `StatsBase` package ready. This can be done by running `using StatsBase` in the REPL.

## How to do it...

1. The variance of a vector can be found using the `var()` function. This can be done by the following:
```var(x)
```

The output would look like the following:

2. For calculating the weighted variance of the vector x with respect to weight vector  ...

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