# MONTE.STDEV function

This article describes the formula syntax of the
MONTE.STDEV function.

## Description

Calculate the mean and standard deviation of a cell over a simulation.

## Syntax

MONTE.STDEV(cell, _reset)

cell |
is a reference to a cell whos mean and stdev is to be computed. |

_reset |
is an optional boolean to reset the calculation. |

Calculate the running mean and standard deviation over the course of a simulation.
This is an array formula that requires at least two output cells to hold the mean and
standard deviation.
If the output range has three cells then the third cell is used to
store the count. This is required if the mean and standard deviation
are `_reset`

during a simulation.