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# Introducing statistics

In this section, we'll look at statistics using both built-in functions and simple custom ones. Statistics are used a lot throughout quantitative finance. Larger time series are often analyzed, and F# has great support for sequences of numbers; some of its power will be illustrated in the examples mentioned in this section.

## Aggregate statistics

Aggregated statistics is all about statistics on aggregated data such as sequences of numbers collected from measurements. It's useful to know the average value in such a collection; this tells us where the values are centered. The `min` and `max` values are also useful to determine the extremes in the collection.

In F#, the `Seq` module has this functionality built-in. Let's take a look at ...

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