# CONFIDENCE.T

stats · from excel · excel: not yet compared · sheets: not yet compared

confidence interval for a population mean, Student's t

## signature

```
CONFIDENCE.T(alpha, standard_dev, size)
```

returns: `number`

## arguments

- alpha: number: required
- standard_dev: number: required
- size: number: required

## examples

formula and result, asserted in the engine test suite.

| formula | result | with |
| --- | --- | --- |
| `=CONFIDENCE.T(0.05, 3, 4)` | `4.773669457925557` | none |

## related

- [AVEDEV](https://deepcalc.com/docs/functions/avedev.md): average of absolute deviations from the mean
- [AVERAGE.WEIGHTED](https://deepcalc.com/docs/functions/average-weighted.md): average of values weighted by a second range
- [AVERAGEA](https://deepcalc.com/docs/functions/averagea.md): averages values including text and logicals
- [AVERAGEIF](https://deepcalc.com/docs/functions/averageif.md): averages cells that match a condition
- [AVERAGEIFS](https://deepcalc.com/docs/functions/averageifs.md): averages cells matching multiple conditions
- [BETA.DIST](https://deepcalc.com/docs/functions/beta-dist.md): beta distribution
- [BETA.INV](https://deepcalc.com/docs/functions/beta-inv.md): inverse of the beta distribution
- [BETADIST](https://deepcalc.com/docs/functions/betadist.md): legacy form of BETA.DIST (cumulative)

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source: https://deepcalc.com/docs/functions/confidence-t