# XWUIChartStandardDeviation

A standard-deviation chart: a fixed-type wrapper around `XWUIChart` that plots series values together with a spread band around them, highlighting how far points deviate from the mean. Supply `{ series }` of `{ x, y }` points plus a `block` preset (1-4) and `size`. Use it to show variability and dispersion in a metric, not just its central trend.

## Basic Usage

This example renders two series (Series A and Series B) of six monthly values (Jan-Jun) as lines with a deviation band around them, at medium size.

```example
file: examples/BasicUsage.ts
html: examples/BasicUsage.html
title: Basic Usage
description: Two monthly series plotted with a spread band, so each month shows both the value and how far it sits from the mean.
```

## API Latency Samples

Per-minute p95 response times for two service endpoints, where the deviation band contrasts a volatile checkout API against a stable search API.

```example
file: examples/ApiLatencySamples.ts
html: examples/ApiLatencySamples.html
title: API Latency Samples
description: Twelve minutes of p95 latency for Checkout and Search endpoints, with the band exposing spiky versus tight response times.
```

## Bottling Line Fill-Weight QC

Sampled net fill weights from two filler heads against a 500 g target, where a wide band flags a miscalibrated head.

```example
file: examples/BottlingFillWeightQC.ts
html: examples/BottlingFillWeightQC.html
title: Bottling Line Fill-Weight QC
description: Ten bottle samples per filler head, with Head 2's broad spread revealing over- and under-filling versus an on-target Head 1.
```

```api
```