One-Sample T‑Test

<title>One-Sample T‑Test</title>
<description>## Class: `OneSampleTTest` (returned by `CompareMeans.oneSample`)</description>
<keywords>one-sample, t, test, class, onesamplettest, returned, comparemeans.onesample, public, fields, js, new, x</keywords>

# One-Sample T‑Test

## Class: `OneSampleTTest` (returned by `CompareMeans.oneSample`)

**Constructor**

```js
new OneSampleTTest({ X: number[] }, mu0=0)
```

- Requires **n ≥ 2**.

### Public fields

- `t: number` – t statistic.
- `df: number` – `n - 1`.
- `p: number` – two‑sided p‑value.
- `sd: number` – sample standard deviation.
- `se: number` – standard error `sd / sqrt(n)`.
- `mu0: number` – hypothesized mean.