# CONFIDENCE

## Content

This function returns the confidence interval for a population mean.

## Syntax

`CONFIDENCE(alpha, stdev, size)`

## Arguments

This function has these arguments:

| Argument | Description |
| -------- | ----------- |
| *alpha* | [Required] The significance level used to calculate the confidence level. The confidence level equals 100 \* (1 - alpha)% |
| *stdev* | [Required] Population standard deviation for the range |
| *size* | [Required] Number representing the size of the sample; if not an integer, the number is truncated |

## Examples

`CONFIDENCE(0.5,B4,D5)`
`CONFIDENCE(0.5,R4C2,R5C4)`
`CONFIDENCE(0.05,3.5,150)` gives the result 0.560106363